Nightingale snorts. "He was a young police trainee sent to guard a crime scene. He took a witness statement from someone who turned out to be a ghost and hared off on his own unofficial investigation. Dragged another trainee along with him for the ride." His face darkens momentarily at that, but he moves on without further comment. "I caught wind of it quickly and got him recruited into the Special Assessment Unit, which is the Met's impressive euphemism for the Folly these days. The entire case was riddled with the uncanny and Peter turned out to have a knack for sensing magic... and using it too."