Conversation so far:
How is Henry Hill connected to an Informant?
Henry Hill became an FBI informant, and his testimony helped secure 50 convictions, including those of mob capo (captain) Paul Vario and James Burke on multiple charges.
When did Henry Hill become an FBI informant, and his testimony help secure 50 convictions happen?
Henry Hill became an FBI informant in 1980
What did Henry Hill receive in exchange for testifying?
Henry Hill testified against his former associates to avoid a possible execution by his crew or going to prison for his crimes.

Question: When did he go into witness protection?
Self-contained rewrite: When did Henry Hill go into witness protection?