He Wasnt Doing Math News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Math class on tuesday and actually heard miss ritzer ask philip to stay after class. she was the last person to see the two together on tuesday. cambria says last period at colleen ritzer's math class seemed normal. she didn't think anything of it when ritzer asked 14-year-old chism to stay behind when the ball rang at 1:55 p.m. >> he was a little bit more quiet than usual. he had his ear buds on. he wasn't drawing. he wasn't doing math. he wasn't paying attention. she said if he could stay after to do what he had missed that day. >> reporter: nearly an hour and a half later, clottier remember...

That chism's parents are separated. chism's father, a former military man, is now living in florida. the question is, could trouble at home be one of the reasons behind his alleged attack? >> an investigation is a broad and painstaking effort. any and all information that's pertinent and relevant to proving our case is taken into consideration. >> reporter: would something like that be relevant? >> it could be. >> reporter: freshman student cambria sat near chism in ritzer's math class. she said he was a good student but something was different about his behavior on tuesday. >> he was a little...