Mr. Loughner was a scrawny, average teenager with a mop of curly hair. He played saxophone at football games and jammed with a friend's garage band. In his freshman and sophomore years at Mountain View High School, Mr. Loughner flew under the radar."All he did was play video games and play music," said Tommy Marriotti, a high school friend. Mr. Marriotti said much of Mr. Loughner's free time was devoted to the school band. He wasn't especially political, Mr. Marriotti said, though he expressed frustration with the Bush Administration.
If Loughner continued playing video games, this combined with his other mental problems might explain why he gunned down so many people.
It turns out that at one point two cops delivered a notice to Loughner's home to notify him that he had been kicked out of college, and it seems to me that the police should have made a couple of calls to get some more details, and let the FBI know that there is good reason to believe that he is not qualified to have a gun.