A San Leandro neighborhood was on edge Saturday after a brazen daytime robbery and shootout at a medical marijuana club that led to the death of an 18-year-old Oakland man. Alameda County sheriff's investigators were still searching for three suspects after five men -- several armed with semiautomatic rifles and pistols -- stormed the medical marijuana club at 16360 Foothill Blvd. on Friday and exchanged gunfire with the store owner. The shooting happened just before the pot club was due to open at noon, said sheriff's Sgt. Linda Thuman. The owner was inside with one other employee, she said, when...