the agent in charge of the fbi's jacksonville office is james casey.he kidnappers appeared to be deactivating quinn's cell phone after each of the calls they made to reid. >> somebody in the scheme was smart enough to take the battery out of the cell phone because we were able to through some technical capabilities and determine that that phone was not only off but had no power to it at certain times. >> meaning you can't trace it? >> meaning you can't trace it. >> while there was no pinpointing an exact address where quinn's calls were originating, technicians were tracing pings when the phone was in use. those are the electronic connections made when a phone hits a particular cell tower, and that gave investigators a general idea where quinn might have been held. fbi agent tony k was selected as the lead crisis negotiator for the bureau. >> we're tracking the phone and we're thinking we've got some leads. >> agents felt they were making progress, but then suddenly the phone was also pinging farther away. the kidnappers and quinn might have been on th

. >> watching from another room was fbi agent in charge, james casey. >> how did she seem in that interviewhe was very disheveled. her story did not make sense. >> and immediately, investigators were confused. why was quinn so annoyed? and why wasn't she cooperating in the search for her kidnappers? they got few answers that night, and quinn returned home. but two days later -- >> hey, quinn. >> yeah. >> i'm george. >> hi, george. >> quinn gray was a different person when she met with detective george harrigan of the st. johns county sheriff's department. >> from the beginning our goal was let's let her tell her story. >> it's just been the most incredible ordeal to go through something like this and then in a 24-hour period to be brainwashed so significantly that you actually believe that your husband is trying to kill you. >> quinn said the kidnappers had in essence brain washed her into believing her husband wanted her dead and that she wasn't cooperative with investigators earlier because the kidnappers told her if she gave away any information about them, they would find her and kill h