There is still no sign of the person who fatally stabbed a teenager in Jacksonville Saturday night. The 15 year-old boy was found at a carnival in the Jacksonville Mall parking lot. He was taken to Onslow Memorial where he was pronounced dead. The Jacksonville Mall released a statement saying it is increasing security at peak shopping times. Investigators don't know if the stabbing has anything to do with the carnival. Crimestoppers is offering a reward in this case.