The NYPD says a 19-year-old Seymour woman was killed while attending a graduation party in the Bronx over the weekend.  Police say Tyanna Johnson was shot five times on Friday night when two men exited a silver BMW and opened fire on the crowd.  4 people were struck by bullets.  The others, a 15-16-and-24 year olds, are all in stable condition.  Police say Johnson was caught in the crossfire and not the intended target.