Conversation so far:
What was Henry Hill an informant for?
Henry Hill agreed to become an informant and signed an agreement with the Strike Force.
Did Henry Hill testify?
Henry Hill testified against his former associates to avoid a possible execution by his crew or going to prison for his crimes.
Did Henry Hill have to go into witness protection?
Yes, Henry Hill did have to go into witness protection.

Question: Where did he move to?
Self-contained rewrite: Where did Henry Hill move to during his time in the witness protection program?