The photo is better quality and shows the tattoos that police referenced in their description.
Chicago police release surveillance video of man wanted in USPS letter carrier attack
The attack happened Saturday morning at a gas station in the 2800-block of South Pulaski Road.
The suspect left the gas station convenience store. hid inside a postal worker's truck until she re-entered the vehicle, then police said, he pulled her hair and directed her to drive to a nearby parking lot. He then told her to move to the back of the van and remove her clothing, police said.
After a struggle, the postal worker was able to get away, police said. The suspect drove off inside the mail truck.
The truck recovered nearly six miles away and the suspect was gone, police said.
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There's a $50,000 reward for information leading to an arrest.
Anyone with information is urged to call the U.S. Postal Inspection Service hotline at 877-876-2455.