WOBURN, Mass. (AP) — A jury has rejected an insanity defense and convicted a Burlington man of killing his longtime girlfriend in her home, a slaying witnessed by a friend of the woman's teenage daughter who was video chatting with the girl.
Christopher Piantedosi was convicted Monday of first-degree murder for the May 2012 stabbing death of Kristen Pulisciano.
Prosecutors say the 40-year-old Piantedosi stabbed Pulisciano more than 30 times because he was angry she wanted to end their relationship.
The defense said Piantedosi has a history of mental illness and was under the influence of prescription drugs.
Authorites say minutes after the stabbing, Piantedosi texted a friend with what he had done. He then threw away his bloody clothes and changed into clean clothes, which prosecutors say showed he was fully aware of his actions.