Austin police search for motive in shooting rampage

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(AUSTIN, TX)  On Saturday Austin police began analyzing the aftermath left in downtown after they say Larry McQuilliams, an Austinite with a criminal record, went on a shooting rampage. When it ended, the 49-year old shooter was dead.

McQuilliams targeted the police department headquarters, the federal courthouse and the Mexican Consulate in Austin.

All three buildings were riddled with bullet holes after the gunman fired more than 100-rounds in a matter of ten minutes. McQuilliams wasn't able to hurt any bystanders or officers, perhaps thanks to the quick reaction of one Austin police sergeant.

Austin Police Chief Art Acevedo says the sergeant, who was working with the department's horses from the mounted patrol unit, "held two horses with one hand, he discharged one round, at least one round, with a single handed shot." Medical examiners are now trying to figure out if that officer's bullet killed McQuilliams or if it was a self-inflicted gun shot wound.

The department's most pressing focus is finding a motive. Officers think McQuilliams acted alone and they're scouring his social media accounts to confirm a motive.