What worries Hank about meeting with the "real" FBI agents in Chapter Eleven?

FBI agents who are really agents arrive and Hank is once again worried that he's overlooked something. He says that if anyone is going to tie him to the crime, it will be these men. The men tell Hank that he has to come with them and that they want him to repeat his story. Hank realizes he has no choice and gets into the backseat of the agents' car.