He kept after Cardini and Hough for six months.
3 seconds sound clip from the The Naked Street (1955) movie soundboard.
You can hear this line at 01:06:32.445 in the DVD version of the movie.
Quote context
[...]
- Then I followed him to Grand Central. He bought a ticket for Sing Sing.
- Yeah, better tail him tomorrow. After we'll see.
- What did he say? Why? He must have had a reason. What did he say?
- I went over the whole Barricks file with the D.A.
- He kept after Cardini and Hough for six months.
- But he couldn't get them to admit they'd been scared into changing their testimony.
- So... So I guess this is it.
- I don't know what else to do, Nicky.
[...]