House of wax ?

hey do u guys remmber the part in house of wax... who is the truck driver guy the one that looks like a hillbilly ..... in the end they said that the 2 parernts didnt have 2 sons they had 3 ... so teh truck driver guy might be one of the son ... is he GOOD or BAD .... and why isnt he helping BO and VINCENT with they're wax buisness