CHANNELVIEW, Texas – A teenager was sexually assaulted in the Channelview area by a man who posed as a police officer, according to deputies.

The Harris County Sheriff's Office has released surveillance video of the man they believe committed the crime about 4:30 a.m. on Oct 15.

Investigators said the man approached a 16-year-old who was walking on a sidewalk. He identified himself as a member of law enforcement and told her to get into his car. The man said he was going to take her to the police station for breaking curfew.

The girl told investigators he took her under the overpass of Highway 90 where the San Jacinto River passes under the freeway. She said he forced her to have sex with him.

The teen described her attacker as a black male, approximately 6 feet tall and weighing about 280 pounds. He had a mustache and other facial hair and may have an earring in his left earlobe. He was driving a black, 2007-2009 Saturn Aura, which may have had temporary or "paper tag plate" affixed to the rear bumper of the vehicle.

[WATCH: SURVEILLANCE VIDEO OF SEX ASSAULT SUSPECT]

The man was armed with a black and silver semiautomatic handgun.

The Harris County Sheriff's Office said the man did not produce any form of law enforcement identification. He only verbally identified himself as an officer.

Anyone with information is asked to call the Harris County Sheriff's Office Child Abuse unit at 713-830-3250, or call Crime Stoppers at 713-222-TIPS (8477). Callers could earn up to a $5,000 reward.

EDITOR'S NOTE: This story was incorrectly connected to a separate story about the arrest of two men in connection with a different sexual assault case. The correction has been made to this story to indicate the perpetrator is still outstanding.