A proposal to increase the punishments for sexual offenders could put teenagers in prison. State law punishes sexual conduct with a minor who is at least 15 with a class 6 felony — the least serious felony type, which can potentially be moved down to a misdemeanor. House Bill 2169 seeks to rectify that by changing the classification to a class 4 felony, for which the standard penalty is 2.5 years in prison, and mandating one year of jail time if the offender was placed on probation. …