The defense rested its case Friday in the Lindsay Clancy murder trial after eliciting several days of testimony about her mental state before and after she strangled her three young children.

Prosecutors then began calling rebuttal witnesses in the trial, which is likely entering its final days. Closing arguments are expected next week.

Clancy, a former labor and delivery nurse, has pleaded not guilty to murder charges in the deaths of her children Callan, Dawson, and Cora Clancy, who ranged from 8 months to 5 years old. They were found in the basement of the family's home in coastal Duxbury, Massachusetts. Clancy jumped from a second-story window after strangling the children and remains paralyzed from the waist down.

Prosecutors argue that Clancy, 36, planned the killings.

Clancy's lawyer, Kevin Reddington, hasn't disputed that she killed the children but says she should not 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.