About 30 Corpus Christi police units surrounded Del Mar College’s East Campus after a 911 call of shots being fired at about 6:45 p.m. Monday, Oct. 5. While armed officers searched the Memorial Classroom building for a shooter, witnesses outside told officers there were no shots fired. Instead, a truck had repeatedly backfired on Ayers Street near Wienerschnitzel, witnesses said. Photos by Meagan Falcon/Foghorn Police officers arrive on Del Mar College’s East Campus in response to a 911 call of shots being fired on site. “Basically, we had a truck that backfired four or five times on Ayers and everybody freaked out,” said…