Nearly 10 years later, families and officials still search for answers in SC bike shop deaths

Tom and Lorraine Lucas looks at photos of the victims of a quadruple homicide in November 2003 at the motorcycle shop where their son worked, at their homein Spartanburg, S.C., on Wednesday, Oct. 24, 2013. Deputies have not made any arrests after four people were killed at Superbike Motorsports. (AP Photo/Jeffrey Collins) (The Associated Press)

Details of a quadruple homicide are included on these playing cards passed out to inmates in South Carolina prisons in this Wednesday, Oct. 24, 2013, photo in Spartanburg, S.C. The cards were created by Tom Lucas, whose son, Brian, was killed in the unsolved shootings. Four people were killed inside a motorcycle shop in Spartanburg County on Nov. 6, 2003. Investigators have followed more than 750 leads but haven’t made any arrests, leaving four victims’ families searching for answers. (AP Photo/Jeffrey Collins) (The Associated Press)

The building that once housed Superbike Motorsports sits empty on Wednesday, Oct. 24, 2013, in Chesnee, S.C. The building has been abandoned since four people who worked in the shop were shot to death in November 2003. No arrests have been made in the killings. (AP Photo/Jeffrey Collins) (The Associated Press)

One of South Carolina's most heinous killings remain unsolved after almost 10 years.

Four people were killed inside a motorcycle shop in Spartanburg County on Nov. 6, 2003. Investigators have followed more than 750 leads but haven't made any arrests, leaving four victims' families searching for answers.

The victims were killed with the same 9 mm pistol. Investigators think the killer came in the back of Superbike Motorsports, perhaps through an open garage door.

In March 2012, Sheriff Chuck Wright released a revised sketch of a customer in the store less than an hour before the killings. At the time he said he thought that man was the killer. But now he says he isn't as sure, thinking instead that the man may have information that can crack the case.