David Mason was 44 when he was found dead of gunshot wounds in Oklahoma City on September 20, 2007. Investigators determined the wounds were the result of intentional violence and ruled the death a homicide, but the circumstances leading to the shooting were not released and remain unclear.

Detectives sought to establish how Mason came to be in the location where he was killed and who might have wanted to harm him, but the investigation produced no public breakthrough. No suspect has been publicly named and there has been no arrest; the case was later described as cold.

If anyone knew David Mason, his movements around September 20, 2007, or has information that could help identify those responsible, please come forward with what can help the investigation.