FARMINGTON — A man accused of sexually assaulting a teenager was being held Monday on $100,000 cash bail at the Franklin County Detention Center.

Farmington police arrested Joseph Magee, 40, of Farmington on Thursday on a charge of gross sexual assault.

Police received information Wednesday and began an investigation into the complaint.

The girl told police that Magee threatened her with a hammer when he raped her, according to Farmington police Detective Marc Bowering’s affidavit filed with a Franklin County court.

Police were told that previous assaults had occurred on multiple instances in another county.

Bowering interviewed Magee and he “admitted to having sex” with the teenager “anywhere from 60 to 70 times in the last year or two,” Bowering wrote.

“He did not admit to any of the sexual assaults occurring” at a residence in Farmington, according to the affidavit.

A conviction on a gross sexual assault charge carries up to 30 years in prison and a $50,000 fine.

Donna M. Perry can be contacted at:

[email protected]