Defense lawyer has asked for an hour to request emergency stay after jury deadlocked for third time

• Lindsay Clancy murder trial: live updates

The judge in the trial of Lindsay Clancy, the Massachusetts mother accused of killing her three young children, plans to declare a mistrial after the jury could not reach a unanimous verdict and remained deadlocked after a week of deliberations.

Jurors in Plymouth state court spent more than 38 hours in deliberations over the charges against the 36-year-old mom, which came on the heels of a weeks-long trial that directed national attention to maternal mental health issues that can occur postpartum.

Karen Solomon had been missing for six days after her husband Kurt Solomon was found dead at their home

A mental health advocate suspected of killing her police officer husband was found dead on Monday, six days after she disappeared from her Massachusetts home, authorities said.

Karen Solomon, an advocate who called for improvements and greater awareness of police mental health issues, had disappeared after Worcester police officer Kurt Solomon was found dead at their home just before 5.30am on 18 August. Officials had named Karen Solomon a suspect and said she was believed to be armed.

The attorney for Clancy, who strangled her three children, says she suffered from postpartum psychosis

Hundreds of Lindsay Clancy supporters, many wearing pink clothing emblazoned with phrases such as “Believe”, “She Needed Help” and “Peace For Lindsay”, gathered on Thursday outside the courthouse where she is on trial in the killings of her three children.

Several of the 300 women, and a few men, said Clancy’s story resonated with them and that they wanted to raise awareness about how the mental health system treats women. Clancy’s lawyer does not dispute that she killed the children, but says she should not be held criminally responsible because she was mentally ill.