The lawyer of a 30-year-old Wisconsin man — charged with sexually abusing a teenager more than 70 times over six years — filed a motion in Freeborn County District Court Monday to dismiss his client’s charges.

Shawn Allen Kaehn faces four counts: first-degree criminal sexual conduct involving sexual penetration of a victim 13 to 15 years old; second-degree criminal sexual conduct of a victim 13 to 15 years old by a position in authority; third-degree criminal sexual conduct of a 16 to 17 year old involving multiple acts; and fourth-degree criminal sexual conduct of a 16 to 17 year old involving multiple acts.

The alleged acts included intercourse and oral sex until July 2010.

According to court reports, the sexual assaults were sporadic, so Kaehn could “quiet things down so nobody knew … so nobody would find out.”

In 2010, Kaehn reportedly confessed to the girl’s mother and said “he messed up,” court documents state.

During the court proceedings Monday, Kaehn’s public defender, Stephen Erickson, also requested a contested hearing for his client to be held within 28 days.

Kaehn remains in the Freeborn County jail on $80,000 bail.

His most serious count, first-degree criminal sexual conduct, carries a maximum penalty of 30 years in prison and a $40,000 fine.