Add Yahoo as a preferred source to see more of our stories on Google. Derek Rosa, who’s now 15, attacked his 39-year-old mother, Elina Garcia, as she slept in their apartment in Hialeah, Fla., on Oct.

A 13-year-old boy who was allegedly fascinated with the hockey-masked killer from the Friday the 13th horror franchise stabbed his mom 46 times, then sent a picture of her blood-soaked corpse to a ...