A 49-year-old woman—who said she lived with Johnson in Louisiana last year—alleged Johnson was violent with her on multiple occasions, including one in December in which he hit her so hard that one of her breast implants was damaged.
The woman said she approached the NFL about the subject in March before going to the police. She was granted a temporary restraining order against Johnson, and the case remains under investigation.
Although Johnson has reportedly denied the allegations privately, the woman said she has photographic and audio evidence.
TMZ later reported on Wednesday that Johnson's accuser was a detective for the Thibodaux Police Department for more than five years before resigning after "filing a complaint with the Equal Opportunity Commission that she was sexually harassed by a superior officer."
Johnson served as the NFL's vice president of officiating from 2010 until 2012, stepping down to become the league's first full-time game official.