A shooting at a Houston-area community college that wounded three people on Tuesday erupted when two men argued after bumping into each other, according to court documents released Thursday. One suspect, Carlton Berry, 22, was arrested on a charge of aggravated assault the day of the shooting at Lone Star College, and a second was charged the next day. Although officials declined to name the second suspect, a probable cause affidavit identified him as Trey Foster, 22. He has not yet been arrested. The affidavit said an argument ensued when a third man bumped into Mr. Foster. The three parted ways, but later saw one another, and shots were fired.