"How are we going to find Esperanza?" Michelangelo asked, speaking the question on everyone's minds. "We kinda have to find her sometime you guys." Donatello looked at his brothers thoughtfully, then spoke.
"I've been perfecting a tracker I call the Turtle Tracker. It was supposed to be a gift for Master Splinter, so he wouldn't worry when we seemed to go missing. But I don't think he'll mind another use of his Christmas present." Donatello smiled. "My tracker can find any turtle anywhere, all you need is...DNA." He groaned, slamming his head down on the table. "We don't have her DNA, I'm a failure." He groaned.
"Dude, can't you remember she backed into the wall before she skedaddled? Maybe, big maybe, but maybe some of her DNA rubbed off before she ran off." Raphael asked smugly, motioning to the wall the newest turtle had run into before she had disappeared. With a gasp of excitement Donatello was up and running to the wall, checking oh so carefully for any trace of DNA, skin cells, anything.
"Bingo!" He exclaimed.