Conversation so far:
what was Henry Hill arrested for?
On April 27, 1980, Hill was arrested on a narcotics-trafficking charge.
What was he selling?
CANNOTANSWER.
did he go to jail?
While in his cell, the officers would tell Hill that the prosecutor, Ed McDonald, wanted to speak with him.
where was he arrested?
CANNOTANSWER.
What did ed want with him?
McDonald didn't want to take any chances and arrested Hill as a material witness in the Lufthansa robbery.
Hill then agreed to become an informant.
Was any one else arrested at the same time?
Shortly afterwards, Burke and several other Lucchese crime family members were arrested by federal authorities.

Question: did they know it was him that snitched?
Self-contained rewrite: Did Burke and the other Lucchese crime family members know that Henry Hill is the one who snitched?