Conversation so far:
Was Henry Hill an informant?
In 1980, Henry Hill was arrested on narcotics charges and became an FBI informant.
What did Henry Hill testify about?
Henry Hill testified against his former mafia associates, resulting in 50 convictions, including those of caporegime Paul Vario and James Burke on multiple charges.
Was Henry Hill afraid of testifying?

Question: is there any important information about the article that you found significant?
Self-contained rewrite: Is there any important information about the article that you found significant about Henry Hills informancy?