. >> reporter: students saw chael landsberry, a former marine who served in afghanistan down and they ran toward the gunfire to help. >> we tried lifting him up. he was like this, like trying to hold his wound, like holding it. >> reporter: another boy shot in the abdomen. he's in stable condition. then the shooter turns the gun on himself. faith evans had math class with him. >> did he have friends? >> sort of. he got bullied a couple times and i saw kids pushing him around and doing mean things to him. >> reporter: now there is just one question. >> everybody wants to know why. the answer is we don't know right now. >> reporter: police say they have no plans to release the shooter's identity out of respect for his grieving family. since police believe the gun he used may have come from his house, authorities are looking into whether his parents can be charged. diane? >> as you said police believe the 12-year-old shooter may have taken the gun from his own home. here's a something to keep in mind. one third of american families have a gun in their home. >>> now the mystery surroundin