Indianapolis police are investigating the death of a man found dead in a tanning bed at a Planet Fitness gym Monday morning.

The man was identified as Derek Sink, 39, by the Marion County Coroner’s Office. 

Sink had went into a tanning bed on Friday, his family told NBC affiliate WTHR of Indianapolis. 

When he failed to come home, his family reported him missing. His aunt said that Sink was wearing an ankle monitor which led investigators to determine he never left the gym. He was…