Murder charge announced for San Francisco Mission District drive-by shooting suspect

A Richmond man suspected in a drive-by shooting that killed a man in San Francisco's Mission District last week is facing a murder charge, prosecutors said. Alexander Martinez, 30, was charged with murder, shooting from a vehicle and being in possession of a loaded, concealed gun, among other things, according to the San Francisco District Attorney's Office. A little before 1:40 p.m. last Friday, Martiez shot the man -- identified by the San Francisco Medical Examiner's Office as 23-year-old Alberto Rafael Vargas Quero -- in the 2300 block of Mission...