SALT LAKE CITY (AP) — Utah prison officials are scrambling to reform the sex-offender treatment program after an audit found serious flaws in the system that treats nearly a third of the prison population. The delays also drive up costs for taxpayers because the state prison population has a relatively high portion of sex offenders and most of them must complete treatment before they can be released. The prison is stopping use of the penile plethysmograph — an outdated system designed to gauge sexual arousal — that is now considered intrusive and inaccurate.