SAN ANTONIO – A father is desperate for help, trying to find his autistic son who has been missing for five days. “It kills me everyday, you know,” Jerry Miranda said. “Not knowing if he is okay. ” Jerry Miranda Jr. wandered out of his home on the Southeast side Sunday evening and never came back. He’s 21 but because of his developmental disorder, his dad says he functions as a 10-year-old. “He has more or less the mind of a 10-year-old,” Miranda said. “He doesn’t know how to fend for himself.