"Investigation is ongoing."

"Need me to get the shovel?"

"Did you know that the word investigate comes from the Latin vestigium, which is just a fancy word for a footprint? Vestiges, leavings. Something that's left behind from the real event, and all you're doing is struggling to reconstruct possibilities based on these leavings. Following tracks in the muck, and it just gets harder and harder as time goes by, as the vestiges get trampled over, buried, contaminated."

"What's your point?"

"Seems to me that most of these cases are just tracking our own tracks. The impressions just get deeper because we're just running around, chasing ourselves."

"Yeah, but you can't just stand still."

"Why?"

"You might get away."