Friday, April 11
(Murrysville, PA) -- Officials in Pennsylvania continue looking for clues as to why a teenage boy went on a high school stabbing spree Wednesday. Alex Hribal wounded 21 students and a security guard in the attack. Three students remain in critical condition. A lawyer for the Hribal family said Thursday the boy is upset and can't believe he did this. He also said Hribal is scared and remorseful. Hribal spent the night before the attack with his parents, who the lawyer says are devastated. Hribal has been charged with attempted homicide and aggravated assault.