I do not believe he had any accomplices and also do not think he was very smart about anything at all.
What is clever about not thinking about video cameras when he decides to kidnap a woman on a city street? Or burning his truck, reporting it stolen and allegedly renting a car in his own name in the same place the truck was found? Or trying to buy a new one with an altered license? These are all of things that led to him being caught. I am not understanding where his cleverness is coming into it, if he has any. If anything, he was "smart" enough to know he couldn't leave a live victim to testify against him this time.
ETA: I wouldn't refer to anyone who helped him without knowing, i.e. let him sleep over, as an "accomplice" That would make families accomplices all the time.