A man sexually assaulted a woman who pulled over because of car problems, Williamson County sheriff's officials said.

WCSO

Investigators released this composite sketch of the suspect.

The assault happened Thursday, September 25 around 8:30 p.m. on Highway 29 near Ronald Reagan Boulevard.

The woman told investigators a man pulled up behind her, appearing to help her. That's when she was assaulted.

The man is described as a possibly light-skinned Hispanic, 5'6" to 5'7" tall, 200 to 220 pounds, with a smooth complexion, dark, bushy eyebrows and bald on top. Investigators say he also has a distinctive birth mark on his right cheek, starting under the eye and continuing to the right ear lobe, which is deformed. He also has small, discolored teeth with spaces between each of the top teeth.

The man was driving a dark blue or black Dodge 1500 pickup with a loud exhaust.

Anyone with information can contact the Williamson County Sheriff’s Office at 512-943-1300.