A former Shattuck-St. Mary's teacher pleaded guilty Friday to seven counts of sexually abusing six students during his time at the Faribault boarding school, Minnesota Public Radio reports.
Lynn Seibel apologized to his family and everyone involved in Rice County Courthouse Friday, saying, "This is something I am not proud about."
Seibel, 71, entered into the tentative plea deal earlier in the day, the Faribault Daily News reported. His public defender, James Martin, told reporters outside the Rick County Courthouse that the deal was struck with the County Attorney's Office.
The former teacher pleaded guilty to one count of second-degree criminal sexual conduct, five counts of fourth-degree criminal sexual conduct and one count for use of minors in a sexual performance, MPR reported.
Although Seibel could serve less than three years in prison when sentenced, both attorneys in the case expect him to get 52 months for the most severe count and several years of probation for the others. He was also ordered to undergo a psychosexual assessment prior to sentencing by Rice County District Court Judge Christine Long.
Seibel was charged in October 2012 with 17 counts of sexual misconduct in connection with the alleged abuse of students ages 15 to 18, between 1996 and 2003.
More: See the criminal complaint in the case (disclaimer: graphic material included)
Seibel -- who worked at Shattuck-St. Mary's from 1992 to 2003 and was a dorm parent for many of those years -- denied the charges in a jailhouse interview with MPR in March.
He was fired from the school in 2003 after child pornography was discovered on his computer, although police were not told about it, the Star Tribune reported.
According to MPR, previous allegations of misconduct by Seibel floated around the hallways of the Faribault boarding school for years, but were never reported to police.
The former prep school drama teacher is also a professional actor, and has a string of credits on film and television, including the character of the "naked professor" on the hit CBS sitcom "The Big Bang Theory." He also had a part in the Minnesota-made film "D3: The Mighty Ducks."