Oh, we're working on it. It's called routine police work.
5 seconds sound clip from the Super Troopers movie soundboard.
You can hear this line at 00:40:12 in the Blu-ray version of the movie.
Quote context
[...]
- He strangles her and puts her face in pig food?
- Yeah. Jane Doe. Do you know her?
- Oh, we're working on it. It's called routine police work.
- Apparently, she had a cartoon monkey tattooed on her back. John Chimpo, I'm told.
- Are you suggesting that a cartoon monkey is bringing drugs into our town?
- Look, I know we don't like each other.
[...]