STOCKTON — The San Joaquin County Sheriff’s Office released the identity of Stockton’s 28th homicide victim of the year.Sonya Coilton, 59, was found dead on a sidewalk Tuesday night just hours after 48-year-old Dung Van Nguyen was declared dead south of downtown. Both victims had trauma to their bodies and their deaths are being investigated as homicides by police.At about 9:30 p.m.