- You've had a tail on her for six months. Why?
- She's Brown's girl. She's our most valuable lead.

8 seconds sound clip from the The Big Combo (1955) movie soundboard.

You can hear this line at 00:06:44.900 in the Blu-ray version of the movie.

Quote context

[...]

- You can't tell a jury a man's guilty because he's too innocent...

- He's no more innocent than this gun!

- Now stop getting emotional, Leonard!

- He's innocent until he's proven guilty.

- Yes, Captain.

- Is there anything else, Captain?

- Yes. The girl. Susan Lowell.

- You've had a tail on her for six months. Why?

- She's Brown's girl. She's our most valuable lead.

- We know next to nothing about Brown, but a woman knows, she makes it her business to know. If I can get a hold of her and make her talk...

- Leonard, you've spent six months trying!

- She went to Vegas, you went to Vegas. She flew to Cuba, you flew to Cuba.

- Couldn't get authorization for the expense, paid it out of your own pocket.

- I had to, you wouldn't back me up.

[...]