Even if he had told the truth on the stand and O.J. had been convicted, Mark says he could never have gone back to his anonymous life as a hardworking detective. "I don't like the recognition. I'd rather be behind the scenes with something that interests me. That changed completely," he says. "I'd try to go out into the field to work on other murder cases, and the suspects wanted to talk about Simpson case. I mean, that's pretty debilitating when you can't be taken seriously in that regard."