Clayton, MO (KSDK) - A west St. Louis County man has been ordered to prison after pleading guilty to sex crimes against a teenage girl.

19 year old Joshua Witkowski of Ballwin pleaded guilty last week in St. Louis County court to charges of sexual assault and child molestation in connection to the crimes against the 14 year old victim.

Court records show Witkowski will serve 120 days of shock treatment to determine where he will be forced to serve the full seven year sentence assessed in the sexual assault case and concurrent 6 year terms for the molestation charges.

Manchester Police investigated the case against Witkowski using DNA evidence that linked the suspect to the crimes.

While investigating the case, police found evidence that other girls might have possibly been victimized by Witkowski, however no additional charges have been filed.