Crime Stoppers is offering a $10,000 reward for information in the fatal shooting of a man in Greektown.
The victim was gunned down June 30 in the area of Monroe and St. Antoine.
A 20-year-old was also assaulted during the altercation, which involved six people.
Police have released surveillance pictures of the six people.
Police are also looking for a light colored, possibly silver, Ford Ranger pick-up, a dark colored Chevy Impala and a white Dodge Caravan.
Anyone with information on the individuals in the group is asked to call Crime Stoppers at 800-SPEAKUP.
All calls are anonymous.