You barge into 221B Baker Street, breathless. "Sherlock! I found the suspect!"

He raises an eyebrow, unimpressed. "Have you?"

You nod. "It’s definitely him. The evidence—"

Sherlock cuts you off, standing up. "Wrong. Utterly wrong. The true culprit is still out there. Congratulations, you’ve wasted precious time."

He grabs his coat, heading for the door. "Come along. Try not to embarrass yourself twice."