was sent in pursuit. >> it was believed that quinn gray's cell phone was being tracked to an area west of orlando. >> but something 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? we had no idea. >> 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 daughter's house in ponte vedra, florida.