And it has happened again
http://afp.google.com/article/ALeqM5htMhvae9SQ5gVBlEQaGwu-8h4_EgA 16-year-old boy was shot dead by a second student Thursday in a school cafeteria in Knoxville, Tennessee, police said.
The student suspected of killing the boy was arrested without incident on a nearby street six minutes after police received the report of the shooting at 8:11 am (1211 GMT).
"This was not a shooting that was a random act," William Roehl, deputy chief of the Knoxville, Tennessee police told reporters.
"Both the suspect and the victim knew each other," Roehl said at a press conference.
"We don't know the particulars as to why it escalated to the situation that occurred today."
Witnesses told the Knoxville News Sentinel that the argument began with shouting and shoving.
The 15-year-old shooter pulled a gun out of his backpack, shot the other boy and then "casually walked away as if nothing had happened," one student told pastor Kevin Perry.
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I got to come north, ya'll.