VERNON, Conn. (AP) — A man who police say killed his father, a woman and himself in Casper on Friday told a neighbor in Connecticut weeks before the killings that he believed his father gave him Asperger's syndrome and said his dad should be "castrated" to prevent him from having more children.

Neighbor Matt DiPinto of Vernon, Conn., told reporters that Christopher Krumm made the comments while giving him a ride home a few weeks ago.

Police in Casper say Krumm shot an arrow into the head of his father, James Krumm, while his father was teaching computer science in a classroom at Casper College, after having fatally stabbed his father's live-in girlfriend at their home. They say Christopher Krumm then fatally stabbed himself and his father.