UPDATE

New sketch of killer released

If you know this person, call Cherokee County CrimeStoppers at (864) 489-2746.

Authorities continued their manhunt Saturday for the person responsible for four murders in Cherokee County over the past week.

On Friday night, Cherokee County Sheriff Bill Blanton released a new sketch of the person being sought.

More than 100 investigators, including crime lab scene technicians and federal authorities as well as state and local law enforcement personnel, are working around the clock to find the killer.

If you have seen the person whose image appears in the sketch here or think you might know who he is, call your local law enforcement office; Cherokee County CrimeStoppers at (864) 489-2746; or 9-1-1.

There is a $2,500 reward for information leading to the arrest and conviction of the person responsible for the slayings. You do not  have to identify yourself in order to leave a tip.

"Someone out there knows this person," Blanton said. "And he could be a danger to his friends, a danger to his family and to his co-workers."