Sherlock, Series 01, Episode 01, A Study in Pink
Sherlock Holmes: You can't just break into my flat.
DI Lestrade: And you can't withhold evidence. And I didn't break into your flat.
Sherlock Holmes: Well what do you call this then?
DI Lestrade: ...It's a drugs bust.
Break into: to enter a building or a car by using force in order to steal something
(bust : a situation in which the police go into a place in order to catch people doing something illegal)