Duxbury mother accused of killing 3 kids arraigned on murder charges02:27 PLYMOUTH – Prosecutors alleged Tuesday that Lindsay Clancy, a Duxbury mother accused of killing her three kids, planned the murders in advance and was of sound mind at the time of their deaths.

Prosecutors said during the arraignment that Clancy asked for her husband Patrick to go pick up children's medication from CVS and takeout food from ThreeV Restaurant in Plymouth.

Patrick Clancy rushed to the basement, where prosecutors said he can be heard on the 911 call screaming "in agony and shock" as he discovered the children had been strangled using exercise bands.

The prosecution said that on February 5, Lindsay Clancy used a doctor's cell phone to call her husband, leaving a voicemail saying that she loved him.

A judge instead ordered she remain hospitalized until medically cleared to be moved to a new rehabilitation facility that includes around the clock care.

Lindsay Clancy allegedly wrote on a white board while hospitalized following the children's deaths, asking if she needed an attorney.