Students describe victims, suspect and the terror of the deadly Michigan high school shooting

Investigators are trying to determine why a 15-year-old student opened fire inside a Michigan high school on Tuesday, killing three people and wounding eight others. Local law enforcement and the FBI worked throughout the night at Oxford High School, going through social media posts and surveillance video to search for any relevant information. 

The home of the suspect, who has not been named, was searched on Tuesday. He was taken into custody without incident, but police say he has refused to cooperate with them. 

Oxford High senior Treshan Bryant said the suspect had been bullied, and he decided to stay home from school after hearing about a possible shooting threat.