The son of "Real Housewives of Salt Lake City" star Mary Cosby was arrested and accused of assault and trespassing last week, according to court records .

Robert Clinton Cosby, known on the show as Robert Jr., was arrested Sunday in the Salt Lake City area by the Taylorsville City Police Department. The 22-year-old was charged with assault, failure to stop at the command of an officer, criminal trespass of a dwelling and three counts of violation of a jail release court order, according to a complaint filed Wednesday.

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TMZ was first to report the news.

According to the court document, Cosby was arrested Sept. 5 on "a misdemeanor domestic violence matter," involving his wife, who was identified as A.S.

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