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Unwise — Search History of Murder Methods

nonprofiteer writes "Mark Jensen's home computer revealed Internet searches for botulism, poisoning, pipe bombs and mercury fulminate. A website was visited that explained how to reverse the polarity of a swimming pool — the Jensens had a pool — by switching the wires around, likening the result to the 4th of July. The State pointed out the absence of Internet searches on topics like separation, divorce, child custody or marital property. Julie Jensen died as a result of ethylene glycol in her system, an ingredient found in antifreeze. On the morning of her death, someone attempted to 'double-delete' (apparently unsuccessfully) the computer's browsing history, which included a search for 'ethylene glycol poisoning.'" What if searches for devious, undetectable methods of murder were in everyone's history?

50 of 532 comments (clear)

  1. timothy... by angus77 · · Score: 5, Insightful

    timothy, you're an asshole.

    1. Re:timothy... by a_nonamiss · · Score: 5, Funny

      Now, I can kill someone using a devious, undetectable way. When they find my search history, my defense will be that I clicked on an unmarked slashdot link.

      --
      -Arthur
      Cave ne ante ullas catapultas ambules
    2. Re:timothy... by Anonymous Coward · · Score: 5, Funny

      Your idea of using solar powered chickens as a fuel for spaceships intrigues me and I wish to subscribe to your magazine.

    3. Re:timothy... by icebike · · Score: 5, Insightful

      May not matter if you click it or not, depending on how much pre-fetching your browser does.

      --
      Sig Battery depleted. Reverting to safe mode.
    4. Re:timothy... by dgatwood · · Score: 5, Interesting

      You know, I'd hate to think what the police would think if they dug into my browsing history. As somebody who is currently writing a trilogy of sci-fi novels that involve the military (the Earth military), in the past couple of months, I've searched for:

      • Information about famous plane crashes
      • Various law enforcement techniques
      • Thermal imaging cameras
      • Cyanide gas diffusion rates (to find out how much gas someone would have to use to kill someone in a small room)
      • How to use detcord to blow a door off its hinges (to found out how one would do this when breaching a building)
      • The advantages and disadvantages of various types of automatic and semiautomatic firearms
      • Firefighter operations mode on an elevator (to take absolute control of one)
      • Nuclear fusion and theoretical yield (propulsion)
      • Physiological effects of a vacuum on the human body
      • VoIP adapters and remote phone line access

      In short, my searches would make me look like the sort of person who you'd expect to find holed up in a compound in flyover country, which is downright hilarious since I've never even owned a gun.

      The point is that the evidence described in this story, although it sounds bad, is circumstantial, and could possibly occur innocently. More imprtantly, the Slashdot summary doesn't tell the whole story. There was other evidence in addition to this. Although the browser history might have contributed to a conviction, it was not the sole reason for the conviction.

      --

      Check out my sci-fi/humor trilogy at PatriotsBooks.

    5. Re:timothy... by Walt+Dismal · · Score: 4, Funny

      h ttp://www.google.com/search?sourceid=chrome&ie=UTF-8&q=devious,+undetectable+methods+of+murder+"how to find IP address of Timothy or maybe Julian Assange"+"I am not CIA"+"Really, I'm not CIA, honest"

    6. Re:timothy... by Anonymous Coward · · Score: 5, Funny

      I think you left out a step or two...

      1) Setup a second home WiFi router (that has no internet connection). Turn logging on, and leave it "open"
      2) Harvest MAC addresses of your neighbors as they try to connect
      3) Use the public hotspot with a Live CD like you said, but set your MAC address to one harvested from your neighbor.
      4) If your neighbor gets arrested, it serves him right for trying to mooch off of your internet connection.

    7. Re:timothy... by hairyfeet · · Score: 5, Insightful

      Which is why I think URL shortening should be banned. I mean what if some troll decides a rick roll or Goatse isn't nasty enough, and decides to trollbomb with CP instead? Nowadays your browser cache and history can and will be used against you in a court of law, which I'm sure gives many trolls a pitter patter of glee in their twisted little hearts.

      So as long as we have shortening of URLs and allow the cops to use browser cache as "evidence" then trolls are gonna be a hell of a lot worse threat than ever before. I mean how many average folks can even tell you how to delete much less secure delete, the browser cache and search history? Hell I'm constantly trying out new browsers and don't have a clue on how to do a secure delete on Chromium based like Dragon or the more funky rare browsers like Kmeleon CCF Me, do you?

      --
      ACs don't waste your time replying, your posts are never seen by me.
    8. Re:timothy... by Macgrrl · · Score: 4, Interesting

      Similar problem, I write murder mystery roleplaying games, and as a result frequently search for information on how various methods of murder could be detected or concealed.

      --
      Sara
      Designer, Gamer, Macgrrl in an XP World
    9. Re:timothy... by rahvin112 · · Score: 3, Interesting

      What exactly is the reason for indicating you've never owned a firearm? And what exactly does living in "flyover" country have to do with anything? Do you have this impression that everyone not living on the coasts is some radical gun touting redneck? Because that is how your statement reads to me and that indicates to me that you are one ignorant asshole. Not exactly a ringing endorsement to read your books, but I guess you really aren't targeting those millions that live in "flyover" country eh?

    10. Re:timothy... by The+Mighty+Buzzard · · Score: 5, Funny

      As a radical gun toting redneck in a flyover state, I am offended by your assertion that I am a minority.

      --
      Violence is like duct tape. If it doesn't solve the problem, you didn't use enough.
    11. Re:timothy... by w0mprat · · Score: 5, Insightful

      Similar problem, I write Slashdot comments and this results in many searches to sound like I know what I am talking about.

      --
      After logging in slashdot still does not take you back to the page you were on. It's been that way for 20 years.
    12. Re:timothy... by lwsimon · · Score: 4, Funny

      As a guy in a compound in a flyover country, only about half of those things are in my search history. I already know how to do the other half :0)

      --
      Learn about Photography Basics.
    13. Re:timothy... by Eivind · · Score: 3, Insightful

      Exactly. Nobody will get a murder-conviction from search-history.

      But combine a dead wife with a motive, no alibi, access to the poision used to kill her, search-history indicating interest in the same poision from which she died and other clues, and the sum total, may add up to a conviction.

      Or, if there was enough evidence for a conviction already, search-history such as this, could help prove that the murder was pre-planned and not a spur-of-the-moment kind of thing.

    14. Re:timothy... by Garridan · · Score: 3, Funny

      This reminds me of my favorite n00b mistake as a web dev. Our admin backend had a bunch of clickable "delete" links for frontpage content. No verification, no "undo", just a naked delete. Whenever my boss would go to futz with the site, Alexa ran through and deleted every single item as they spidered each webpage he viewed. I never could get him to stop using our admin page with the Alexa widget (despite this happening twice and me upbraiding him for it both times), which prompted me to finally take time away from putting out other fires and redo the backend with security as a primary objective.

    15. Re:timothy... by Bob9113 · · Score: 3, Insightful

      Which is why I think URL shortening should be banned. ... So as long as we have shortening of URLs and allow the cops to use browser cache as "evidence" then trolls are gonna be a hell of a lot worse threat than ever before.

      I think you may be shooting the wrong messenger, or something like that. The problem is not URL shorteners, it is that courts are allowed to use what you have been reading as evidence against you. This causes a chilling effect on research. While I think "what he read" in this case is outstanding evidence of his guilt, we must consider the greater societal cost of creating an inhibition to studying unsavory topics.

      Freedom of speech and freedom of the press are sullied when the right to hear and read such free expressions is harmed. To take a more prosaic case; suppose a person were fired from his job, asserted that it was without cause, and in the eventual court proceedings to follow the corporation used the person's cached searches for "WikiLeaks" to support an assertion that they believed the person posed a threat to the corporation's information security. Or simply got a subpoena for the person's browser history to go fishing for cause. Suddenly any unsavory search puts you at risk of being terminated without cause (which may not be a big deal for all people, but there are many jobs where with-cause versus without-cause is a substantive issue).

      Chilling effects are not limited to speech and press. They can inhibit the practical value of free speech and free press by inhibiting the consumption of such free expression. Ultimately we must choose whether it is more important to make it easier to convict criminals, or to have the ability to study and discuss our society -- even the ugly bits -- without fear of reprisal. That may not be an easy question to answer, but it is the rational context in which the full weight of the dichotomy must be considered.

  2. Police Doing Actual Police Work? by BondGamer · · Score: 4, Funny

    How awful is it that detectives were able to discover that her husband searched for information on the exact thing that killed her shortly before her death, along with other methods of killing someone. On top of that he attempted to delete traces of it. This is an invasion of piracy.

    1. Re:Police Doing Actual Police Work? by niado · · Score: 5, Insightful

      How awful is it that detectives were able to discover that her husband searched for information on the exact thing that killed her shortly before her death, along with other methods of killing someone. On top of that he attempted to delete traces of it. This is an invasion of piracy.

      Normally in murder cases the significant other of the victim is the primary suspect. As such I would assume (Didn't RTFA so not sure if there is more detail) that it was pretty easy to get a warrant for his house, computer, bank statements, etc. etc.

    2. Re:Police Doing Actual Police Work? by irtza · · Score: 4, Interesting

      They live in the same house... do they have access to the same computer? Could this be suicide and she was hiding the method she would use? Or was the attempted deletion after the fact?

      Of interest is - how is a deleted history available or if it was "attempted" - how would they know? The facts of the murder vs suicide are a bit spacious but I would like to know more about how they uncovered the history.

      --
      When all else fails, try.
    3. Re:Police Doing Actual Police Work? by Chyeld · · Score: 5, Informative

      That's an amazing post. Except for "And destroying evidence is illegal, every sentence in that post is wrong (assuming you're referring to the USA, at least).

      And so is that one, destroying evidence can be perfectly legal, ask any document destruction company. It's destroying evidence that is currently being sought that is illegal.

  3. works the other way, too by Anonymous Coward · · Score: 4, Interesting

    When I wanted to kill someone, I researched methods to do it. Then I realized that I couldn't do it, because the footprints were all over the internet. Time passed, I got over it. Asshole's still alive, but I'm doing better than him now.

    1. Re:works the other way, too by InfiniteWisdom · · Score: 4, Funny

      Naah, I took care of him. I covered my tracks made it look like an accident, but I figured even if they did realize it was murder, you'll be the one they come looking for.

    2. Re:works the other way, too by InfiniteWisdom · · Score: 4, Funny

      Yeah, yeah... I know you're technically not "dead" till the air in your coffin runs out.

  4. Okay, I don't follow this... by pushing-robot · · Score: 4, Insightful

    After Mark Jensen’s wife died mysteriously in 1998, he consented to police searching his home for causes.

    In October 1998, the Jensens’ home computer revealed that searches for various means of death coincided with e-mails between Jensen and his then-paramour, Kelly, discussing how they planned to deal with their respective spouses and begin “cleaning up [their] lives” so they could be together and take a cruise the next year.

    So it sounds like a dumb criminal got caught by police doing their job. Is Slashdot so far toward the anarchist fringe that this is being spun...

    from the unless-everybody-joins-in dept.

    What if searches for devious, undetectable methods of murder were in everyone's history?

    as some sort of The People vs. Big Brother thing?

    --
    How can I believe you when you tell me what I don't want to hear?
  5. Polarity? by Brian+Feldman · · Score: 5, Funny

    How the fuck does a swimming pool have a polarity?

    --
    Brian Fundakowski Feldman
    1. Re:Polarity? by imadork · · Score: 4, Funny

      It's one of those new Star Trek swimming pools. If you ever need to fix it, switching the polarity is risky, but it just might work!

    2. Re:Polarity? by wiredlogic · · Score: 5, Informative

      The housing of a pool light is normally grounded. If it is connected to an active circuit the pool becomes a death trap if someone in the water grounds themselves through another conductor.

      --
      I am becoming gerund, destroyer of verbs.
    3. Re:Polarity? by polymeris · · Score: 3, Funny

      How the fuck does a swimming pool have a polarity?

      Exactly my thoughts.. I'll google it!

    4. Re:Polarity? by PPH · · Score: 5, Informative

      It would take significantly more than that. You'd have to bypass the ground fault protection and then see to it that the resulting short to ground didn't actually draw enough current to trip the branch circuit breaker on overcurrent.

      Its pretty difficult to electrocute someone by messing around with the pool electrical equipment.

      Just saying.

      --
      Have gnu, will travel.
    5. Re:Polarity? by Burning1 · · Score: 3, Interesting

      Or, more likely, if there is sufficient conductivity from the light housing to the water, some other fixture in the pool will provide a ground path. Household voltages are dangerous, but not nearly as much as people like to think, especially the 110 volt stuff.

      Great example: some idiot wired a lamp installed in my bathroom backwards. The lamp had a metal housing that the installer had intended to ground to neutral. Unfortunately, the installer mistook the black wire as neutral, and connected it to the ground post and neutral post on the lamp. The neutral wire was connected to hot on the lamp. The lamp worked fine of course - AC current isn't really directional, and wiring something backwards usually just results in serious safety issues... But it did produce the result of providing an electrically hot conductor that was easy to reach while standing in the bathroom, or even worse - turning the facet on in the sink. Damn thing was wired up like this for a couple of years, occasionally zapping someone before I finally pulled it apart to fix it.

      In my teens I spent a lot of time playing with electricity, and was shocked more times than I can count. Never caused any issues.

    6. Re:Polarity? by camg188 · · Score: 4, Informative

      June 9, 1991, Kings Island amusement park, Mason, OH - Around 8:00 PM, a 20-year-old man entered the Oktoberfest pond, apparently to retrieve a lost hat. He was electrocuted instantly, and two people entered the pond to rescue him. Both the man who originally entered the pond and one of the rescuers died at a local hospital, and the other rescuer had serious injuries. The accident was linked to a faulty water pump, which had short-circuited, electrifying the water.
      - http://kiextreme.com/history_timeline.php

      Don't know if it was a polarity problem.

    7. Re:Polarity? by demonlapin · · Score: 5, Informative

      You're quite lucky. The risk from mains current isn't that 120VAC at some small amperage will cook you; it's that 60Hz AC will throw your heart into ventricular fibrillation. A foot-to-foot connection poses no real risk other than pain, while a hand-to-left-foot circuit very well may kill you.

  6. Say what? by rueger · · Score: 5, Insightful

    Believe it or not, I'm not new here, but this has to be the most garbled incoherent summary in memory.

    "reverse the polarity of a swimming pool"
    "likening the result to the 4th of July"
    "someone attempted to 'double-delete' the computer's browsing history"

    I guess if I knew who the hell "Mark Jensen" was it might make more sense. Better run out and read some tabloids.

    1. Re:Say what? by sjames · · Score: 4, Insightful

      We all know that small miracles can be accomplished by reversing the polarity. Sometimes you can even propel your ship into an alternate dimension that way! However, IIRC it was a virus rather than reversing the polarity that won the day in Independence Day.

      As for deletion, double deleting is for hacks, the pros prefer to triple dog delete.

  7. Re:Rule number one for breaking any law by DurendalMac · · Score: 4, Interesting

    Ask the Palin email guy how trying to destroy his data turned out. He would've had a slap on the wrist for the email hijacking, but it was obstruction of justice that got him the time he's doing now. It doesn't matter if you wreck your drive. Your internet history is recorded and retained for 2+ years at your ISP in accordance with the SAFETY Act of 2009.

  8. consent by wizardforce · · Score: 4, Informative

    Jensen was found guilty of first-degree homicide in 2008 based on this and other incriminating evidence, including a letter written by his wife before her death. He appealed the conviction, arguing for one that the warrantless police search of his computer violated his Fourth Amendment rights. The Wisconsin Court of Appeals did not agree as he had signed a consent form.

    Once you give permission to a search, you don't get to retroactively revoke permission once they find evidence against you. It would be a completely different matter if they just barged in without his permission or a warrant. That would be unconstitutional; this however, is just stupidity on his part.

    --
    Sigs are too short to say anything truly profound so read the above post instead.
  9. Re:Rule number one for breaking any law by TheCarp · · Score: 5, Informative

    Drill press? Do you know how easy it is to encrypt a drive?

    Not that I would trust that alone but, if you do a reinstall of the OS over an encrypted drive, nobody is recovering what was there previously. Why bother with the theatrics, and expense. Not to mention, that the holes in the drives may not prove much, but they tell them you are hiding something.

    Besides, its hard to get to work in the morning without breaking ANY law. How would you even know? You could be violating the law RIGHT NOW just by reading this. In fact, you probably are in some jurisdiction. Who is to say that jurisdictions law doesn't apply to you right now? Try explaining why it doesn't apply after they have picked you up while you are there on vacation.

    Ridiculous? Absolutely, but the point is, the world is a big and complicated place full of lots of laws. Luckily, you can get away with ignoring the vast majority of them, most of the time. However, those few that they really have sticks up their ass about, like murder, honestly, its pretty wrong anyway so start with not doing it.

    Anything that is not so wrong, but, still illegal, and they still have sticks up their ass about... well... chances are you have time to plan more and encrypted drives should just make sense. I mean shit, the Ubuntu installer had it as an option, last I looked. Also, he can delete all he wants, as long as they can find the right cookies they can probably recreate much of your search history. Really just best not to rely on clearing the cache.

    -Steve

    --
    "I opened my eyes, and everything went dark again"
  10. Re:Huh? by demonbug · · Score: 5, Interesting

    What if searches for devious, undetectable methods of murder were in everyone's history?

    If I'm not mistaken, you're condoning the murder of his wife?

    Wow, talk about missing the point...
    How was what he said in any way condoning murder? Pointing out that there are any number of reasons someone might have rather incriminating things in their search/browser history doesn't translate to condoning murder. Nor does it suggest that it was unusual, unfair, or an invasion of privacy to look at the suspect's search history in this context. It merely points out that going the other direction - finding something "suspicious" in someone's search history does not mean they are up to no good (also shows how easy it might be to poison someone's results if you were trying to frame them).

    Really; you somehow read into his comment that he somehow condones murder? Utterly bizarre.

  11. Re:Rule number one for breaking any law by Anonymous Coward · · Score: 3, Funny

    May God have mercy on any poor son of a bitch who has to review two years my web history.

  12. Re:Rule number one for breaking any law by windcask · · Score: 5, Informative

    You know that hasn't become law yet, right? It passed the house, but never passed the Senate. It's been idle since last June.

    http://www.opencongress.org/bill/111-h780/show

  13. Bravo, timothy by gregmark · · Score: 4, Insightful

    Let the grumpy-pants anarchy-baiters grumble. The system can always use more disorder, whatever its present condition.

  14. Another Article by TheCarp · · Score: 3, Informative

    I was curious about this...particularly what it means to "reverse the polarity of a swimming pool"... um, I didn't know they had poles :) (clearly something to do with the wiring...)

    Anyway: http://volokh.com/2011/01/04/interesting-example-of-the-use-of-computer-search-evidence

    Apparently its an interesting case. I haven't read much yet, about to dive in, but, it does quickly raise the question of... who did the searching? Looks like the defense claim is suicide. I know that if I planed to kill myself by a posion, I would want to know quite a bit about how it worked and what to expect.

    Though, I am not sure thats the one I would choose.... nicotine maybe.... or nitrous oxide... glycol tastes sweet if I remember, its why dogs sometimes die from drinking antifreeze, so seems like a good choice to slip in food or drink... so... hard to say. Have to read...

    -Steve

    --
    "I opened my eyes, and everything went dark again"
  15. Search evidence fails standard of reasonable doubt by mysidia · · Score: 4, Insightful

    If you looked back into my search history far enough, you could probably find places where I searched for all those different things in the past.

    I wouldn't need to search for any website to tell me how to reverse polarity of a swimming pool motor, because it's basic electronics..

    And yet, I have not murdered and will not murder anyone using those or any other methods.

    Is it reasonable to suspect people of murder just because they have in the past searched for, found, or viewed material, that might relate to methods used by the murderer?

    How is it even proven that the searches are born of some intent, and not merely idle curiosity, or FEAR for ones own safety?

    • Searches for: botulism. This is something every person needs to know about, because it poses a danger to everyone who eats food. People can protect themselves if they have some understanding of what the danger is, where you could be exposed to the toxin, how it could reach your mouth, how to detect it, how to recognize the first signs, what to do, etc
    • Searches for: poisoning. Same deal; it is a good idea to know what methods people might try to use to poison you, especially if you think someone is after you. A search for poisoning can relate to (as much) detecting/knowing if you're poisoned and/or what to do to protect/preserve life.
    • Searches for: pipe bombs. There were several high-profile media events. It would probably be a good idea for members of the general public to understand what exactly a pipe bomb is, how to recognize it, and who to contact or what to do (LEAVE QUICKLY/RUN), if you think you see what might be an explosive device that could threaten your life.
    • Searches for: mercury fulminate. Again, being able to recognize the signs of mercury poisoning is a good idea. People learn more about a subject by hearing about it, and then looking up materials on the subject.

    Would police have made such a deal of simple searches, if they were done by looking up books on the subject at the library? Would a list of books checked out seriously be used to convict an alleged suspect?

  16. NOT Google by D+H+NG · · Score: 4, Interesting

    Given that Google was founded in 1998, the same year that Julie Jensen died, it's highly unlikely that Mark Jensen used Google to make these searches.

  17. NaNoWriMo is your friend by AJWM · · Score: 3, Interesting

    It's the perfect excuse: "I was doing research for the novel I'm writing". Just be sure you've got enough of a first draft of that novel on your drive to be convincing.

    (I am a writer. I have all kinds of weird stuff in my browsing history. Which gives me an idea for a crime thriller series, about a hit-man (or perhaps serial killer?) who writes mysteries. Or perhaps its been done. Anyone remember this movie?)

    --
    -- Alastair
  18. Re:Rule number one for breaking any law by BCoates · · Score: 4, Informative

    It would have automatically died yesterday along with everything else that didn't pass before the ending of the 111th Congress.

  19. There was other evidence by preaction · · Score: 3, Informative

    Someone testified that Mark confessed to him and tried to get him to kidnap a potential witness. His wife was suspicious and told other people such. The search evidence isn't the only thing around this guy's neck.

  20. For how long? by wanax · · Score: 3, Interesting

    What I'm more curious about, is what is the statute of limitations, so to speak, of the police having consent. I was the victim of an (attempted) armed robbery a few years ago in the apartment I currently live in (he didn't think anybody was around, and ran out after threatening me.. it sucks waking up from a nap to an intruder with a gun standing over you), and I sure as hell didn't mind the police searching my apartment then.. but when is that consent removed? All they found was the guy's jacket, the case is still open.. could they still come back and search without a warrant, even if they were interested in a different case? Or do they have to re-establish consent after the first search?

    1. Re:For how long? by Anonymous Coward · · Score: 3, Informative

      They would have to obtain consent (or have a warrant) each time they came to your house.

    2. Re:For how long? by wizardforce · · Score: 3, Insightful

      "I give you consent to search my apartment for the purpose of catching a thief" is not the same as "I give you the eternal right to search my premises for any and all reasons." Once their investigation concludes, the permission you gave them goes away. At least that's what would be sane; we could, of course, have a few idiot judges that failed history class give huge power to the state...

      --
      Sigs are too short to say anything truly profound so read the above post instead.