GRAND TRAVERSE COUNTY, Mich., (WPBN/WGTU) -- A former northern Michigan middle school principal accused of sexually assaulting young boys is now facing an additional charge.
During his preliminary hearing on Thursday, Karl Hartman, the former principal at Kingsley Middle School, will be charged with an additional charge of criminal sexual conduct first degree.
According to court records, one alleged victim said when he was 8 or 9 years old he spent the night at Karl Hartman's home and Hartman had him sleep in his bed, where he put his hands down the boy's underwear and groped him.
Another alleged victim stated in court records that when he was around the same age, he was called to Hartman's office for using an inappropriate word in class.
The victim said when he got to the office he was told to close the door and Hartman put him on his lap and rubbed parts of his body.
A third victim said he routinely spent time at Hartman's home when he was about 14 years old, court records said.
In January, Hartman was charged with two counts of second degree criminal sexual conduct, one count of accosting a minor and two counts of furnishing alcohol to minors.
The Grand Traverse County Prosecutor said the alleged incidents date back to 2009.
Hartman is also accused of violating his bond by going into an area that he wasn't allowed to be in.
If convicted, Hartman faces life in prison.