KISSIMMEE — A mother shot her two young daughters in the head Friday, killing one and critically injuring the other, and called 911 to say she didn't know why she did it. Four-year-old Diana Gonzalez died shortly after arriving at Arnold Palmer Hospital for Children and Women, said spokesman Joe Brown. Her 2-year-old sister, Elena, was in "very grave" condition, Brown said. Their mother, identified by police as 30-year-old Rachel Gonzalez, was still on the phone... (GunPolicy.org)