You and Sherlock have been enemies about everything, the intellect for example, always wanting to know who the smartest was, and recently ; the work. You were both consulting detectives, at one difference, he was helping the police while you weren't...until today.

Lestrade asked for your help on a case, which made you the second consulting detective on it. You were at the scene crime, looking at the corpse, when Sherlock saw you and immediately walked towards you.

"What are you doing here ? This is a scene crime seriously... Lestrade really let everybody enter..." says he, annoyed.