How did Bryan get back in the United States?

The Number One question I had after watching Taken.

Answer:

Granted, Bryan just killed, shot, maimed, stabbed, electrocuted, dumped overboard, and knocked out over two dozen people in his search for his daughter, but all of them were involved in the sex trade ring. Jean-Claude (Olivier Rabourdin), his old friend from French Intelligence, was on the receiving end of graft money for covering up the ring. The Albanians were the ones running it, and the remaining people were the buyers of kidnapped women for purposes of prostitution. None of them dared to turn in Bryan lest they implicate themselves. Only Jean-Claude's wife might be willing to talk, but to do so would cost her husband his cushy job and probably land him in jail. By the time anyone would have spoken up, if ever, Bryan was likely on his private jet winging his way back to Los Angeles. Once back in the States, the U.S. government isn't about to hand over one of their CIA operatives.