Chester Otto Weger (born March 3, 1939) is an American man who was convicted in 1961 of the murder of one of three women found slain at Starved Rock State Park the previous year. He was held at Pinckneyville Correctional Center and at one time was the longest serving inmate incarcerated by the State of Illinois as well as the third longest in state history before his release on February 21, 2020. On November 21, 2019, the Illinois Prisoner Review Board granted parole to Weger by a vote of 9–4. He was released on parole February 21, 2020. In August 2022, a DNA test concluded that the hair found in victims’ hands didn’t belong to Weger, proving his innocence after 60 years spent in prison.