Pepi was one of them. That's what Joe found out, and that's why Pepi knocked him off.
4 seconds sound clip from the All Through the Night (1942) movie soundboard.
You can hear this line at 01:22:40.847 in the Blu-ray version of the movie.
Quote context
[...]
- Gloves is referring to certain parties from across the pond.
- Pepi was one of them. That's what Joe found out, and that's why Pepi knocked him off.
- Well, if that's on the level, what are you telling me for? Why don't you spill it to the cops?
- Now, listen, Marty. I know you're no mental giant, but try to juggle this, all of you.
- I got a firsthand report tonight on what it's like on the other side, from that Hamilton babe.
[...]