The Doctor And The Magizoologist

He hadn't meant to steal one. Truly, he hadn't. He’d just wandered into the Department of Mysteries by accident. Let his niffler loose in a hall filled with shiny, golden Time-Turners by accident. Conveniently looked the other way when the niffler had successfully shoved one of the small spinning hourglass apparatuses into his pouch and scurried back into Newt's case. By accident. That's the story he'd be sticking to, in any case.