A soccer coach who a Los Angeles family says was the last person who had contact with their dead son is being charged with the boy's murder ... TMZ has learned.
The missing 13-year-old boy Oscar Omar Hernandez was found dead in a ditch last week in Oxnard and his family says he was last seen with his soccer coach, 43-year-old Mario Edgardo Garcia Aquino.
Law enforcement sources tell TMZ .