Johnny Lee Eller, 34, was found shot in the head and dead in Grove, Oklahoma, on June 4, 1977. He’d been on vacation at the Red 11 Port Resort when the murder was discovered.

Eller was described as a real estate mogul who was entangled in a major financial controversy known at the time as the P.F.A. Scandal. Investigators treated those business dealings as a possible motive and questioned a local woman during the inquiry, but no charges were filed and no arrests were ever made.

The case went cold without anyone being brought to justice; the identity of the killer or killers remains unknown and the full details of the real estate scandal have largely faded. Does anyone with memories of Grove or knowledge of Eller’s business ties have information that could help reopen lines of inquiry?