Prosecutors say Corie Walsh discussed the Massachusetts murder trial with friends hours before her 2-year-old son was found fatally injured.

JOLIET, Ill. — An Illinois mother accused of killing her 2-year-old son had been closely following the nationally watched Lindsay Clancy murder trial and discussing it with friends only hours before the child was found unresponsive, according to prosecutors and court records. Corie Walsh, 40, has pleaded not guilty to three counts of first-degree murder in the Sept. 1 death of her son, Barrett Walsh, at the family’s Frankfort home.

The timing of Walsh’s conversations about the Clancy case has become one of the most closely watched details in the prosecution’s account, but authorities have not established that the Massachusetts trial caused or inspired Barrett’s death. Walsh’s defense has strongly rejected suggestions that the two cases are connected. Her attorneys say she was experiencing a psychotic episode when her son died and have argued that her mental condition is central to the case against her.

The Illinois investigation began shortly after 4 p.m. Sept. 1, when Frankfort police were called to a home in the 22700 block of Brook Stone Court for a report involving an unresponsive child. A neighbor was performing CPR on Barrett when officers arrived, according to accounts of the court filings. Emergency crews took the toddler to a hospital, where he was pronounced dead. Preliminary autopsy findings cited by prosecutors said he died from asphyxia caused by compression of the neck. Police later announced that Walsh had been charged following an investigation involving the Frankfort Police Department and the Will-Grundy Major Crimes Task Force.

Investigators also found Walsh injured inside the home, according to prosecutors. Authorities said the injuries appeared to be self-inflicted, and she was taken for medical treatment. Three other children in the family were not physically harmed. An infant was at the residence, while two school-aged children returned around the time the emergency was discovered, according to prosecutors. Walsh’s husband was out of state that day and returned home afterward. The surviving children were evaluated as a precaution.

Prosecutors have said Walsh made disturbing statements to officers after police arrived, including claims that she believed Barrett was evil. They also alleged in seeking her detention that she made statements about harming her other children and her husband. Those allegations have not been proven at trial. Defense attorneys have described Walsh’s speech and behavior after officers arrived as evidence that she was detached from reality rather than acting rationally, and they have sought psychiatric treatment for her while she remains in custody.

Another part of the state’s account focuses on what Walsh had been doing earlier that day. Witnesses told investigators she had recently become “very invested” in the Clancy murder trial in Massachusetts and had been discussing it in a group text with friends until about 12:30 p.m., roughly three and a half hours before Barrett was discovered. Defense attorney Andrea Lyon has said speculation that Walsh committed a copycat crime is unfounded. Prosecutors have cited the messages as part of the surrounding circumstances but have not publicly identified the Clancy case itself as a proven motive.

The timing placed the Illinois case against the backdrop of another emotionally charged prosecution centered on a mother, the deaths of young children and disputed claims about severe mental illness. Clancy, a former Massachusetts nurse, was tried in 2026 over the January 2023 deaths of her three children in Duxbury. Her defense argued she was not criminally responsible because she was suffering from severe mental illness, including postpartum psychosis. Prosecutors disputed that account and argued that her actions were intentional and deliberate. The jury could not reach a unanimous verdict, and a judge declared a mistrial Sept. 4.

That overlap quickly drew national attention to Walsh’s case, but the legal questions facing the two women are separate. Walsh has entered a not-guilty plea in Illinois, and prosecutors bear the burden of proving the murder charges against her beyond a reasonable doubt. Her lawyers have said their investigation will focus heavily on her psychiatric condition. A claim that a defendant was experiencing psychosis does not by itself determine criminal responsibility; the defense and prosecution must litigate the issue under the law and evidence applicable to the Illinois case.

At Walsh’s first major court hearing Sept. 8, prosecutors asked that she remain in custody while the case is pending. Judge Amy Bertani denied her request for pretrial release after finding that the state had presented clear and convincing evidence supporting detention and that the alleged danger could not be adequately addressed through release conditions. Walsh appeared in court while still recovering from her injuries. Her attorneys argued that she needed intensive psychiatric treatment and sought a setting where that care could be provided.

The defense has portrayed the events before Barrett’s death as sharply inconsistent with a planned killing. During the detention proceedings, Walsh’s attorneys described ordinary family communications from earlier in the day and said she had been making plans involving her children. They have used those details to support their position that her behavior changed during an acute psychiatric crisis. Prosecutors, however, have emphasized the circumstances of Barrett’s death, Walsh’s alleged statements afterward and the alleged threats toward other family members as reasons she should remain confined while the case moves forward.

Walsh returned to Will County court on Sept. 24 and pleaded not guilty to all three first-degree murder counts. Her husband and other relatives attended the proceeding, and Lyon said afterward that the defense was examining Walsh’s treatment records and remained concerned about whether she was receiving the psychiatric care her attorneys believe she needs. The plea formally placed the case on a path toward further pretrial litigation, including disputes over evidence, mental-health records and the defense theory surrounding Walsh’s condition.

The Clancy proceedings, meanwhile, remain unresolved after the Massachusetts mistrial. As of October, prosecutors had not announced a new trial, and continuing court disputes remained pending. That uncertainty underscores why the mere fact that Walsh followed Clancy’s case cannot establish what happened in Frankfort. The Illinois prosecution will have to stand on its own evidence, including forensic findings, witness accounts, Walsh’s alleged statements and any admissible records related to her mental state.

Walsh’s prosecution now moves into its next pretrial stage with the central factual disputes still unresolved. She remains detained after pleading not guilty to three counts of first-degree murder, and no trial date has been announced. Her next reported court appearance is scheduled for later in October, when attorneys are expected to continue addressing the evidence and the defense’s psychiatric claims.

Author note: Last updated October 20, 2026.