sheriff's detective howard cole gray's cell phone was being tracked to an area west of orlando. >> buthing had gone wrong. before tracing the calls, investigators had to get a judge's approval. and in the rush to fill out the proper paperwork, someone made a small, but critical error. >> when they actually went to get the order signed by a judge, what was typed into the actual affidavit and order, the numbers were transposed. >> so somebody put the wrong phone number in? >> human error. >> so the phone you were following wasn't quinn's phone? >> correct. >> how long did you follow that other phone. >> all day saturday. >> and suddenly what investigators thought were solid leads from quinn's cell phone simply vanished. >> when you realized you were following the wrong cell phone, what? >> my hair was on fire. my hair was on fire. i thought how can something like this happen and we were really back to square one, who are we looking for? >> the rest of saturday went by with no word from quinn or the kidnappers. meanwhile, quinn's mom, gail sikes, left her georgia home and headed to her da