ืNorth Hollywood - A 17-year-old pedestrian killed in a hit-and-run accident in North Hollywood that police said may have occurred during a car race was identified to day. Milton Marquez died in the accident reported in the 7000 block of Whitsett Avenue about 8 p.m. Wednesday, according to police and coroner's Assistant Chief Ed Winter. His brother also was struck seriously in jured, police with the Valley Traffic Division said.