throughout the time investigators searched for quinn. on the same day she was released, they asked reid to take a lie detector test. and he agreed. >> he was being candid. he took a polygraph with a very experienced polygrapher who cleared him. from being a suspect. >> officials with the fbi came to the same conclusion. reid gray had absolutely nothing to do with quinn's kidnapping. >> i apologized to him in the fbi building and we hugged. i said i'm so sorry that i thought that. >> but that still left a question, who had kidnapped quinn. >> i didn't know what was going on. i was crying and i was like, please, just tell me that you're not going to kill me. >> back at the fbi office, quinn was less than completely cooperative with agents after her release. >> did they say anything when they dropped you off, any threats? >> yeah. >> what did they say to you? >> that's the part i'm not getting into. >> she eventually became angry.