Prince William County Police said a Woodbridge man sexually assaulted a teenage girl outside the Potomac Library on Friday. 

Donald Morgan Sullivan is charged with aggravated sexual battery, indecent exposure, masturbation in public, assault and battery and indecent liberties with a minor. He was arrested on Monday. 

Police said Sullivan approached the 14-year-old victim from behind and started talking to her while she was standing outside the Woodbridge library after it closed on Friday.

At one point, he allegedly sexually assaulted her, police said. When the victim received a phone call, he left the area.

The information in this article was provided by the Prince William County Police Department. Where arrests are mentioned, it does not indicate a conviction. 

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