Forensic psychologist Kirk Heilbrun testified Monday that Lindsay Clancy has bipolar disorder and was experiencing anxiety, depression, insomnia and suicidal thoughts in the weeks leading up to the deaths of her three children. Heilbrun, who evaluated Clancy over three days this year, said his findings differed from those of forensic psychiatrist Dr. Avram Mack, who testified Friday that Clancy did not have bipolar disorder or psychosis.
Both experts testified as rebuttal witnesses for prosecutors in the murder case, which hinges on Clancy’s mental state when she strangled her three children before jumping from a second-story window in January 2023. Closing arguments are expected later this week. Clancy’s attorney Kevin Reddington does not dispute that she killed the children.
But he says she shouldn’t be held criminally responsible because she had postpartum psychosis, a rare mental illness linked to the stress, sleep deprivation and hormonal changes that follow childbirth. He said she also had bipolar disorder and that antidepressants prescribed worsened her condition. Prosecutors say the former labor and delivery nurse planned the killings and contrived to get her husband out of the house by sending him to pick up medicine for one of their children and dinner for the family.
Heilbrun said he struggled to reach a diagnosis of bipolar 2 disorder “because of all the diagnoses in the records and all the symptoms that she experienced.” People with bipolar 2 disorder experience cycles of depression and hypomania, which is less intense than the mania experienced with bipolar 1 disorder. She felt on top of the world. She felt really close to them, her husband and her kids and so on.
But, it’s also something that it didn’t look like a manic episode so much as it looked like she was really feeling good.” Heilbrun echoed earlier testimony about Clancy's struggles with sleep, the negative reactions to medications she was prescribed, anxiety about returning to work and leaving her children as well as intrusive thoughts that include wanting to hurt herself. But he noted that at a psychiatric hospital she stayed about two weeks before she killed her children that she never reported having hallucinations or suicidal thoughts. Her main concern was insomnia.
Clancy, 36, has pleaded not guilty to murder charges in the deaths of Callan, Dawson and Cora Clancy, who ranged from 8 months to 5 years old. The two sides have presented experts with starkly contradicting testimony on whether Clancy was suffering from postpartum psychosis. After the defense rested Friday, prosecutors began calling rebuttal witnesses, starting with Mack.
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