Wow good on Nick for following his instincts. He trusted his gut and was right, she saved the girl!
She was a very smart little girl leaving the trail of gum for them to find her and they were very smart for picking up the connection and following the clues.
I am amazed at how well the team and all investigators are at finding the evidence and clues, however small or large and putting everything together to work out what happened to the victim and who the killer may be. Sometimes I think that luck plays a very big part in it.