(KROC AM News) -- Rochester police arrested a man who reportedly groped a vulnerable adult Saturday night.  

Sue Moore/Townsquare Media

The incident occurred in the parking lot of an apartment building at the 600 block of 2nd Street southwest around 8:30.  The woman was sitting in a car at the time of the attack when a man approached and reached in and grabbed at her.  The victim's mother called 911

Malik Amin Johnson, 37, of Rochester was arrested and is being held on a charge of criminal sexual conduct in the 4th degree.  The victim was not injured.