Plot: Lynn and Paul say their 20-year-old daughter, Loni, went from a straight-A student to a heroin addict, and they’re desperate to get her help. After two felony arrests — including one for allegedly selling heroin to an undercover officer — Loni spent 30 days in rehab, but they say it wasn’t long before they discovered she was using heroin again — and stealing money and jewelry from family members to pay for it