Investigation continues one year after triple murder at Great Lakes Dragaway
Authorities say the investigation is still ongoing.
The three men killed, all in their 20's and 30's, were shot at point-blank range near a vendor's booth during the annual Larry's Fun Fest event.
An estimated 15,000 people were at the event that night.
The FBI is offering a $25,000 reward for information leading to the identification and arrest of the shooter.