Medical examiner testifies about antifreeze found in Julie Jensen’s body

In this article, you will get all the information regarding Medical examiner testifies about antifreeze found in Julie Jensen’s body

Former Kenosha County Medical Examiner Dr. Mary Mainland testified Tuesday morning in the homicide trial of Mark Jensenthe man accused of poisoning, drugging and then suffocating his wife to death for three days in December 1998.

Mainland, a renowned medical examiner who testified in 2008 at Mark Jensen’s first trial in Kenosha County Circuit Court, testified again about the toxic substances found in Julien Jensen’s body after his death.


Former Kenosha County Medical Examiner Dr. Mary Mainland takes the witness stand during the trial of Mark Jensen at the Kenosha County Courthouse on Tuesday, Jan. 24, 2023.


Mainland said she firmly believes the 40-year-old mother-of-two’s death was a homicide and the causes were antifreeze poisoning and asphyxiation.

Mainland, now retired, testified in person during week three of Mark Jensen’s jury retrial for most of the morning. She firmly believes that Julie Jensen did not die by suicide.

People also read…

Mark Jensen, now 63, was convicted in February 2008 of murdering his wife in their home in the Carol Beach neighborhood near the lake. He is on trial here again after years of appeals and battles in state and federal courts.


Special Prosecutor Robert Jambois, left, and Jeremy Perri, one of Mark Jensen’s attorneys, argue over how the previous trial should go to the jury during the trial at the Kenosha County Courthouse on Tuesday January 24, 2023. The court decided to designate the 2008 trial as Jensen’s second jury hearing.


Mark Jensen, according to prosecutors, killed his wife in early December 1998 by poisoning her with ethylene glycol, more commonly known as antifreeze, then suffocating her as she lay in bed, dying and exhausted. breath in order to be with a woman he was. have an affair with. They also allege he killed Julie Jensen out of deep anger over a previous affair she had with a co-worker, as well as other marriage issues.

Mark Jensen, a former stockbroker, searched the internet for ways to make Julie Jensen’s death look like a suicide and terrorized her for years with strategically placed pornography, emails and phone calls , according to prosecutors.

Mark Jensen, however, has maintained his innocence since his wife’s death. Her lawyers argued that Julie Jensen was deeply depressed and took her own life after blaming her husband for her death.

A medical examiner testifies

Although Mainland did not perform Julie Jensen’s autopsy herself, she reviewed the case, toxicology results and medical records when she became a Kenosha County medical examiner in 2005.

Mainland, who testified at Mark Jensen’s forfeiture hearing that Julie Jensen died of ethylene glycol poisoning but could not rule out asphyxiation as a contributing factor in 2007 and then at her trial in 2008 after learning more about the case that Julie Jensen died from complications associated with both poisoning and suffocation, went on to explain at length how ethylene glycol contributed to Julie Jensen’s death.

“There were a number of substances in Julie Jensen’s system, the most important being ethylene glycol which is the ingredient in antifreeze,” Mainland said of the lab reports on the body from 110 to 115 books by Julie Jensen. “The medical examiner found microscopic findings, particularly in kidney tissue, that were very concerning for ethylene glycol poisoning.”

Effects of antifreeze

Photos of samples of Julie Jensen’s badly damaged kidneys were shown to the jury. Mainland explained at length how ethylene glycol destroys the body from within if ingested, and how such materials were found in Julie Jensen’s stomach, liver, and brain after her death.

“Ethylene glycol is an alcohol, and it’s very similar in structure to the ethanol or alcohol that many of us enjoy,” Mainland said. “When ethylene glycol is first ingested, it has the same effect as alcoholic beverages. A person will act drunk or mad or they might have trouble walking or they might stumble. Depending on how much a person takes , she could convulse and go into a coma. And all of this can happen from about 30 minutes after exposure to about 12 hours after exposure. This is the first phase of ethylene poisoning. glycol.

Mainland said the effects get worse from there.

“After that, the amount of ethylene glycol in the body goes down because it’s processed by the liver, so as it’s processed by the liver, it’s turned into a number of other compounds, all of which are most important for the next phase, phase 2 of ethylene glycol poisoning is called glycolic acid, this forces the body to do all it can to try and get rid of the excess acid. acid in the blood. So the person will start to hyperventilate, you can get rid of the acid by breathing quickly, getting rid of the carbon dioxide. The person will hyperventilate and then they will have really deep abnormal breathing. She may also have heart symptoms, the heart may beat hard, it may beat fast, it may even fail.It is these second stages of poisoning and which begin between 12 and 24 hours after ingestion of ethylene glycol. “

As ethylene glycol is broken down into glycolic acid and other acids, including oxalic acid, it combines with calcium in the blood and forms “crystals” that tend to lodge in the kidneys, Mainland explained.

“They cause kidney damage,” Mainland said. “The third stage starting about 24 to 72 hours after taking ethylene glycol is called the renal or renal phase. This is where you can see the kidneys fail. You can see death in any of the three stages.”

Julie Jensen’s kidneys had structures called tubes which contained crystals.

Mainland said Julie Jensen was likely given more than one dose of antifreeze because in the days before her death she showed classic signs of ethylene glycol poisoning, including acting “drunk” and breathing heavily.

She said people who die by suicide with ethylene glycol usually ingest a large amount at once and not administer smaller doses over several days.

Other substances found inside Julie Jensen’s body included Ambien, Paxil and Librium.

Reason for retrial


Mark Jensen, center, listens to former Kenosha County Medical Examiner Dr. Mary Mainland testify during the trial at the Kenosha County Courthouse on Tuesday, Jan. 24, 2023.


Original prosecutor Robert Jambois, a former Kenosha County District Attorney, serves as special prosecutor before Judge Anthony Milisauskas, now the third Kenosha County Circuit Court judge to preside over the case.

Mark Jensen is represented by a team of defense attorneys led by Bridget Krause.

A Kenosha County judge overturned Mark Jensen’s conviction in April 2021 after the Wisconsin Supreme Court ruled Jensen deserved a new trial.

Was it a suicide or a homicide? Julie Jensen died over 20 years ago. Her husband, Mark Jensen, is on trial again.

The court ruled that a letter written by his wife incriminating him in case anything happened to her could not be used by the prosecution as it had been in the first trial. In early 2022, the United States Supreme Court helped pave the way for the new trial when it refused to hear an appeal of the Wisconsin Supreme Court’s decision.

The so-called ‘letter from the grave’ in which Julie Jensen wrote that ‘if anything happened to me’ that her husband ‘would be my prime suspect’ will not be admitted into evidence at this lengthy trial. The high-profile case made headlines across the country.

The defense presented its opening statement in the trial of Mark Jensen. Jensen is accused of killing his wife with antifreeze in 1998.

Mark Jensen, who is charged with first-degree intentional homicide in the death of his wife, remains in custody on $1.2 million cash bond in Kenosha County. He faces life imprisonment.

The prosecution is expected to rest on Tuesday.

Further reading

Kenosha County Homicide Trial Week 3: Inmate Mark Jensen Who Was Told Of Crimes Against His Wife Testifies

Week 2 of the Mark Jensen trial: a man who had a brief affair with Julie Jensen testifies

Mark Jensen’s 2008 Guilty Verdict Day Report from Kenosha News Archives

Mark Jensen trial week 2: digital analyst retrieves search terms and data from personal computer

Jury watches video of Jensen’s house on day Julie Jensen died

Coroner testifies at Mark Jensen homicide retrial on Day 2

Mark Jensen’s retrial begins with opening statements after jury swears in

DA office plans to spend $70,000 next year to retry Jensen case


Medical examiner testifies about antifreeze found in Julie Jensen’s body

For more visit

Latest News by

Leave a Comment

%d bloggers like this: