Traffic Homicide investigators from St Johns County Traffic Unit responded to a single vehicle traffic crash at 9:49pm in southern St Johns County. Investigators were called to a 2008 Suzuki Motorcycle that had crashed on South park Blvd near US-1 South. The rider, whose identity is being withheld pending notification of family, was taken by air to Shands Jacksonville with life-threating injuries. The rider was wearing a helmet the time of the crash, but it is unclear if it was properly secured. Alcohol is suspected as a factor in the crash.