|Behind the scenes|
|Portrayed by||Adam Harrington (voice)|
- "Tom Hagen pays me to help you guys out, but I can't fix this by myself. Can you?"
It was due to these contacts that he caught wind of a scandal that could potentially implicate Fredo Corleone. He informed Aldo Trapani of the situation, that the corpse of one of Moe Greene's business associates was in Fredo's car, which had just been impounded in New Jersey. Trapani destroyed the evidence and Campbell received a reward for his help.