An Illinois mother charged in the strangulation death of her 2-year-old son was in the midst of a “psychotic episode” when the child died, her nationally known defense attorney says, while prosecutors contend she had also been planning to poison her husband.
The dueling narratives in the case of Corie A. Walsh come as her legal team accuses jail authorities of withholding prescribed psychiatric medication. Defense attorneys say doctors at a hospital had recommended continuous psychiatric care after Walsh was discharged.
The starkly different accounts of Walsh’s mental condition are expected to drive a key issue in the case: whether her alleged severe mental illness could meet Illinois’ legal threshold for an insanity defense.
Andrea Lyon, a prominent criminal defense attorney who was previously part of Casey Anthony’s legal team, told News Outlet in a statement this week that Walsh’s actions were the result of mental illness.
Corie A. Walsh, 38, in a booking photo provided by law enforcement. Prosecutors are asking a judge to deny her pretrial release following the death of her 2-year-old son. (Will County Detention Facility)
“This is a tragedy for the Walsh family, all of whom are mourning the loss of this child,” Lyon said. “It is also a tragedy in that Corie herself was experiencing a psychotic episode at the time this happened.”
Still, legal analysts caution that a psychiatric diagnosis by itself is not enough to establish insanity under Illinois law, even when a defendant is described as psychotic.
“The definition of insanity is, as a result of a mental defect or disability, that you’re unable to appreciate the criminality of your conduct,” Richard S. Kling, a clinical professor at Chicago-Kent College of Law and former Cook County public defender who has handled insanity cases, told News Outlet.
Corie Walsh, right, poses with her husband and children inside a church. Walsh faces three counts of first-degree murder in the death of her 2-year-old son, Barrett. (CREDIT: Facebook/ Corie Walsh)
Kling said psychiatrists first determine whether someone meets the criteria for a recognized mental illness before courts consider whether that illness prevented the person from appreciating the criminality of their conduct. He also said defendants who pursue an insanity defense must present evidence they were legally insane at the time of the alleged offense. Illinois also recognizes a separate verdict of guilty but mentally ill, distinct from a finding of not guilty by reason of insanity.
But behind the scenes, a battle over Walsh’s mental health care is unfolding.
Following her arrest, Walsh was treated at Silver Cross Hospital for self-inflicted wounds to her wrists and thighs. According to her defense team, hospital doctors recommended she receive 24/7 psychiatric care upon her discharge.
Corie Walsh, top left, pictured with her husband and children wearing matching holiday pajamas on a couch. (CREDIT: Facebook/ Corie Walsh)
However, Walsh’s attorneys said she is not receiving her prescribed medication inside the Will County Adult Detention Facility.
The Will County Sheriff’s Office, which oversees the jail, did not respond to News Outlet’s request for comment regarding Walsh’s medical treatment.
The defense’s account differs sharply from prosecutors’ allegations.
Along with three counts of first-degree murder, prosecutors also allege Walsh was planning to poison her husband Michael Walsh, before her son’s death.
Further details regarding the alleged poisoning plot – including how far along the plan was or what substance was involved – were not immediately disclosed in court. Michael Walsh was traveling out of state when the couple’s son was killed and flew home that evening. He has not responded to News Outlet’s request for comment.
Speaking generally and not about Corie Walsh’s case specifically, Kling said evidence that a defendant planned or attempted to conceal a crime can become relevant in an insanity case because prosecutors may argue it shows the defendant understood the criminality of the conduct.
Walsh allegedly told police she killed the toddler because she believed he was the “devil,” a petition seeking to deny her pretrial release states.
Defendant Lindsay Clancy watches jurors enter the courtroom during her murder trial on Friday, Sept. 4, 2026, in Plymouth, Mass. (Greg Derr/The Patriot Ledger via AP, Pool)
Witnesses also told investigators Walsh had recently grown “very invested” in the trial of Lindsay Clancy, a Massachusetts mother who was charged with murdering her three children during an alleged bout of postpartum psychosis.
Walsh allegedly texted friends about the Clancy case as late as 12:30 p.m. on the day of her son’s killing.
“It is our hope that through a thorough presentation and investigation of the facts, that all of us will come to see this heartbreak for what it is,” Lyon said.
The competing claims have prompted a deeper investigative look into Walsh’s background.
Kling said a documented history of mental illness, psychiatric treatment and medication can become critical evidence in an insanity case because psychiatrists often examine a person’s mental state before and after an alleged crime to help evaluate their condition at the time of the offense.
News Outlet has reached out to multiple immediate family members, in-laws and former neighbors to determine whether there were prior warning signs, isolation or documented mental health struggles leading up to the holiday weekend.
Additionally, News Outlet has filed public records requests with local police departments seeking years of 911 dispatch logs and wellness checks connected to Walsh’s current and former residences.
Because of the victim’s age, the three first-degree murder counts carry a potential sentencing range of 60 to 100 years in prison, to be served at 100% upon conviction.
