LAPD helicopter forced to land by gunfire 24 Apr 2011 Police have fired tear gas into a building where they believe a suspected shooter is holed up after a police helicopter was shot and forced to land early Sunday morning in Van Nuys. The Los Angeles Times reports that residents of several apartment buildings were evacuated before police attempted to smoke out a suspected gunman. At least one suspect, a 20-year-old, is under arrest. Detectives believe he used a rifle.