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Was gone, and -- i don't know. it's hard to explain. when she looked at us, she said we have to get out now. and one of my other classmates jumped up and said everybody out, come on, let's go, and we just immediately began running. >> now, eight minutes after that 911 call the first deputies arrived, and immediately confronted the gunman who died in a shoot-out with police. there've been no reports of a suicide. that has been the outcome in 29 of 152 school shootings since 1990. now mercer was raised in southern california. quiet kid. apparently liked target shooting. his parents divorced in 2...

Him. he in no way deserves this. >> now mercer grew up with his mother in southern california. he was quiet and road around on a red bike with flcamouflage pants. he liked to target shoot. we still don't know why. did he not like a professor? was he trying to even a score with a bully? we don't know. he told the victims to lie down on the ground and state their religion before firing. one victim tried to stop the shooter before -- so he would not get into an adjacent classroom. >> tried to block the door to keep the gunman from coming in. he was shot three times. hits the floor, looks up at th...

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>> we heard the first shot at, i believe it was 10:38 when the cops said they got their first call, and then one of the students from my class left to go check on the other room, and she was shot in the arm and in the stomach and ran back to our class and told us that there was a gun. it was right next to the room. we heard all the screams, all the shots, heard everything. jon: william la jeunesse live in roseburg, oregon. william? >> reporter: well, jon, one of the questions, as you mentioned, is motive. why here? why now? why yesterday? we don't yet have a manifesto like we did in the case o...