Killer Cases: College Student Murders Entire Family During Pandemic
Quick Read
Summary
Takeaways
- ❖Alex Jackson killed his parents and sister with a .22 rifle, then shot himself in the foot to fabricate an intruder story.
- ❖Investigators found no signs of forced entry or an intruder, and Alex's account was inconsistent with the scene.
- ❖Motive for Alex Jackson included academic failure at the University of Iowa and significant tension with his sister over political views and her bisexuality.
- ❖Mark Jensen poisoned his wife, Julie, with ethylene glycol (antifreeze) and smothered her, then tried to frame it as a suicide.
- ❖Julie Jensen had written a 'letter from the grave' anticipating her husband's actions, which became a central piece of evidence.
- ❖Computer forensics revealed Mark Jensen's searches for undetectable poisons and symptoms of ethylene glycol poisoning.
- ❖A jailhouse informant testified that Mark confessed to poisoning Julie's juice and then smothering her when the poison wasn't fast enough.
- ❖Both Alex Jackson and Mark Jensen maintained their innocence throughout their trials, showing little to no remorse.
Insights
1Alex Jackson's Fabricated Home Invasion and Self-Inflicted Wound
Alex Jackson murdered his father, mother, and sister with a .22 caliber rifle. He then shot himself in the foot to create a narrative of a home invasion, claiming an intruder was responsible. Police found no evidence of forced entry, K9 units failed to track an outsider, and surveillance footage from neighbors showed no suspicious activity. Alex's calm demeanor during initial questioning and his strange comment about the foot wound not hurting 'that bad' raised immediate red flags.
Lack of forced entry (), K9 failure to track (), neighbor surveillance showing no intruder (), Alex's statement 'it didn't hurt that bad' regarding his foot wound (), and two handprints on the gun matching only Alex ().
2Motive for the Jackson Family Murders: Academic Failure and Family Tension
Investigators uncovered that Alex Jackson, an Eagle Scout, was struggling academically at the University of Iowa, having flunked out of his last semester. This likely created significant tension with his father, who was paying for college. Additionally, there was severe animosity between Alex and his sister, Sabrina, due to differing political views and Sabrina's fear of Alex's reaction to her bisexuality.
Alex flunked out of school (), father paying for college (), significant political and personal tension between Alex and Sabrina, including Sabrina's fear of Alex's reaction to her bisexuality ().
3Julie Jensen's 'Letter from the Grave' and Digital Forensics
Julie Jensen, anticipating harm from her husband Mark, wrote a letter to be given to police if anything happened to her. In it, she expressed fear of her husband, stated she would never commit suicide, and included a photograph of a post-it note in Mark's handwriting listing 'own drug supply, bag, hands, syringe.' This was corroborated by computer searches from the family's home computer for 'ways to kill someone,' specifically 'ethylene glycol poisoning' (antifreeze), which were conducted while Julie was incapacitated.
Julie's letter to a neighbor (), post-it note in Mark's handwriting (), computer searches for 'ways to kill someone' and 'ethylene glycol poisoning' (, ).
4Mark Jensen's Motive and Confession
Mark Jensen's motive was to pursue a new relationship with Kelly Labonte, avoiding the financial implications of divorce. He had been having an affair and wanted to 'clean up' his life. A jailhouse informant, Aaron Dillard, testified that Mark confessed to putting ethylene glycol in Julie's juice and, when it wasn't effective enough, smothering her with a pillow.
Emails between Mark and Kelly Labonte discussing 'cleaning up our lives' (), Edward Klug's testimony about Mark discussing undetectable poisons to avoid alimony (), Aaron Dillard's jailhouse confession testimony detailing the poisoning and smothering ().
Lessons
- Pay attention to inconsistencies in a victim's or witness's statements, especially when they are the sole survivor of a violent event.
- Thoroughly investigate all potential motives, including financial strain, relationship issues, and personal failures, even for individuals with seemingly 'good' public personas.
- Utilize digital forensics (computer search history, emails) as a critical tool in solving cases, as it can reveal intent and planning.
- Recognize that a lack of emotional reaction from a suspect, particularly when charged with severe crimes, can be a significant indicator.
- Document and preserve any 'dying declarations' or pre-emptive statements from potential victims, as they can become crucial evidence, even if their admissibility is challenged.
Quotes
"This was not some random intruder that breaks in and executes a family that he doesn't know, with a gun that he didn't bring, with the hope to steal things that are never stolen."
"No one wakes up in the morning and wonders what it would feel like to get shot in the foot with a firearm. Unless you intend to get shot in the foot with a firearm that morning."
"If I don't interview him there, the one person that witnessed this happen, the one person that could provide information, and I wait 72 hours because the gunman who murdered three people and shot him is wandering out in the neighborhood. He dies in the emergency room, and now we got no information. Like I said before, I'd fire myself if I did something that stupid."
"He said that his mother was erased from his life. He said he learned more about his mother while listening to the trial than he had ever heard before."
"If anybody in the Wisconsin state prison system deserves to be there for the remainder of his days to be carried out in a box, it's Mark Jensen."
Q&A
Recent Questions
Related Episodes
The Blue River Murder | Full Episode
"A mother of three vanishes during a blizzard in a small Colorado town, only to be found brutally murdered, leading investigators to uncover a web of secrets and a husband's dark past."
SAVANNAH GUTHRIE'S MOM MISSING: DAY 66
"On day 66 of Nancy Guthrie's disappearance, investigators grapple with two distinct sets of Bitcoin ransom notes, digital tracing challenges, and potential physical evidence like shoe coverings, as new, dubious claims emerge from a 'hyena' seeking payment for information."
Kohberger’s Back, More Dirty Duggar Details & Quad Amputee Charged with Murder
"Newly released surveillance footage of Bryan Kohberger at the DMV, unsettling details of a triple murder by Jenna Struble, and the perplexing case of a quadruple amputee charged with murder are explored."
True-crime cases with recent developments | 48 Hours Full Episodes
"This episode reconstructs four complex true-crime cases, detailing the harrowing searches for missing persons, the challenges of prosecuting murders without bodies, and the enduring quest for justice in cold cases spanning decades."