Nov. 6, 2003: Four people were gunned down at Superbike Motorsports in Chesnee. Beverly Guy, Brian Lucas, Scott Ponder, and Chris Sherbert were killed by the unknown suspect(s).
2005: FBI profiler John Douglas is brought in two years after the deaths to shed new light. Douglas said the shooter knew what he or she was doing and had some contact with the victims.
Nov. 2006: The unsolved homicides were featured on "Geraldo at Large." Families of the victims also relocated to the Upstate to look for tips, including six billboards featuring photos of the victims across the area.
Mar. 1, 2012: Original witness works with deputies to release new person of interest sketch.
DOCUMENT: New flier created in Superbike massacre