Shooter had mental illness history

John Russell Houser was deeply troubled long before he shot 11 people in a movie theater in Louisiana, but decades of mental problems didn't keep him from buying the handgun he used.

Despite public signs of mental illness - most importantly, a Georgia judge's order committing him to mental health treatment against his will as a danger to himself and others in 2008 - Houser was able to walk into an Alabama shop six years later and buy a .40-caliber handgun.

It was the same weapon Houser used to kill two people and wound nine others before killing himself at a Thursday showing of Trainwreck. Three people remained hospitalized on Saturday.