On April 18, 2026, the Clay County Sheriff’s Office marked a grim anniversary by renewing its public appeal in the unsolved 2009 killing of Mark Gregg in Green Cove Springs. Gregg, 54 at the time, was a disabled truck driver who was found shot multiple times inside the couple’s North Road home on April 18, 2009, after his wife discovered him. Detectives say they collected forensic evidence at the scene and noted that one firearm from the household was missing, and they are now asking residents to dig into old memories and share any tip that might finally move the case.
In a Facebook reel posted April 18, the Clay County Sheriff’s Office recaps what is known and urges anyone with information to speak up. The post lists Detective Sean Holmes as the contact on the case, and it points residents to the SaferWatch app and to First Coast Crime Stoppers for anonymous…..