A Chula Vista family is seeking justice for their parents, a married couple who were killed in a suspected drunk driving crash that sent their Jeep off a freeway bridge and into the Sweetwater River. Monica Pedroza, 53, and Ignacio Pedroza, 60, known as Mona and Nacho, were just seven minutes from their home when investigators say a drunk driver struck them from behind. Their car was pushed into the Sweetwater River, where both died. Authorities…