The body of Christopher Alder was found in Hull Mortuary 12 years after his burial.
Alder, a former soldier, choked to death while handcuffed and lying on the floor of a police station in Hull in April 1998.
The Huffington Post reported that Friday, Alder's body was discovered where a different woman was believe to have been stored.
City Council chief executive Nicola Yates made a statement to the press, "I am appalled and distraught at what I have learned and in conjunction with Hull and East Yorkshire Hospitals NHS Trust we will be undertaking a thorough review of the circumstances surrounding the events."
No further events or explanations of the mix up have been reported.