Jurors in the murder trial of Lindsay Clancy have five options as they consider their verdict in the deaths of her three young children. The central focus of the case revolves around a defense arguing Clancy suffered from postpartum psychosis, a severe mental illness that can cause hallucinations.

Clancy's legal team contends that after giving birth to her youngest child, she experienced hallucinations, including hearing a voice that instructed her to kill her children. Expert witnesses have testified about the severity of this illness, and family members have provided testimony regarding Clancy's mental state.

Under Massachusetts law, the burden of proof does not fall on the defendant to prove their mental illness. Instead, the prosecution must establish beyond a reasonable doubt that Clancy was criminally responsible at the time of her children's deaths. This can be achieved by demonstrating either that she did not suffer from a mental illness or that, despite having a mental illness, she retained control over her actions and understood they were wrong.

A not guilty verdict would mean Clancy would be released, a scenario legal experts consider highly unlikely. A more probable outcome is a verdict of not guilty by reason of insanity, which would lead to her commitment to a psychiatric hospital.

"The case really comes down to where she is going to serve the rest of her life; the defence thinks it should be a psychiatric facility, the prosecution thinks it should be in a state prison," criminal defense lawyer Elyse Hershon told the BBC. The outcome will determine whether Clancy is confined to a correctional facility or a mental health institution for the remainder of her life.