Montgomery County Coroner Walter Hofman says a teenager who died earlier this month when he fell from a cemetery bell tower died of multiple injuries, and the cause of the death was suicide. 16-year-old Hatboro-Horsham High School junior Nick Carr fell from the tower at Whitemarsh Memorial Park, at Routes 152 and 463 in Horsham.  Laboratory tests showed that he had marijuana in his system at the time of his death, but Doctor Hofman says there were no other drugs.