I don’t think this is even close to the first time a criminal died in the act, and took out their “family” at the same time, if indeed it was even really their children. The party guilty of mayhem? The criminal.
Yep - if anything it was a suicide/homicide...can’t think of another reason to have the child’s head and shoulders tucked under the t-shirt except to insure there was no escape if the suicide lost consciousness first.