William Joe Mitchell 
, a man with violent past with more than a dozen arrests and a high-risk sex offender out on probation, was believed to have taken the missing 15-year-old Alyssa Frank. Now he is on the most-wanted list of Florida police. If residents in Florida or nearing states spot the man who is driving a black Chevrolet Lumina and has tattoos on his arms and fingers, you are urged to tip the police, because he is possibly William Mitchell.
Polk County Sheriff Grady Judd pleaded with the public for any tips to find the suspect he identified as William Joe Mitchell, 46, of Jacksonville. Judd said Mitchell met Alyssa Frank, of Bartow, on Myspace.com
and cultivated a relationship.
"He lured her away and now he's got her, and we've got to have her back. Safely," Judd said. "We are, as I've said before, incredibly concerned."
Judd spoke to an offender he referred to as "Billy Mitch."
"Don't you dare hurt this young lady. Let her go," Judd said. "Take her to a convenience store. A bus station. But let her go."
Judd said Alyssa sneaked out of her house to meet Mitchell at about 3 a.m. Monday and was reported missing a little more than three hours later.
Source: Sheriff: Sex Offender Has Missing Florida Girl @ Foxnews