The U.S. Postal Inspection Service released photos of a vehicle suspected to be involved in the Milwaukee homicide of USPS Letter Carrier Aundre Cross.
The vehicle is described as a silver Audi Q5 SUV with tinted windows. 
The shooting happened near 65th and Lancaster at about 4:38 p.m. Friday. Police said Cross, 44, who was on duty, died at the scene.
Cross had 18 years of service with the U.S. Postal Service. A married father, he was remembered by family and friends for his religious faith.
The USPS is offering a reward of up to $50,000.
MPD is leading this investigation with the assistance of the United States Postal Inspection Service and the FBI.
