Adrian Makuch, 49, has been on the force since 1988 and serves in the crime scene unit.
Sources tell Action News that Makuch tried to have sex with a 15-year-old boy.
That boy went to Internal Affairs, which consulted with the DA's office. Charges were then filed.
Makuch is charged with inappropriate contact with minor, luring a child into a vehicle, prostitution and corruption of minors.