The Manteca Police Department is seeking the public’s help in solving a July 4 shooting death that occurred shortly after 4 a.m. on Independence Day in the 2100 block of West Yosemite Avenue.Responding to a 911 call regarding a gunshot victim at that location, officers found 15-year-old Antonio Dylan Brown inside a residence. Brown had suffered a gunshot to his head. Officers immediately began life saving measures until they were relieved by Manteca Fire and ambulance personnel.