"Policemen In Heaven" joke

St Peter is standing at heaven’s gate when a man walks up.
“Welcome to heaven my son. What did you do with your life? ”
“I was a policeman, ” he responded.
“What kind of policeman? ” St Peter asked.
“I was a vice officer. I kept dangerous narcotics out of the hands of kids. ”
“Wonderful my son, welcome to heaven. Pass through the gates. ”
A few moments later a second man walks up.
“Welcome to heaven my son. What did you do with your life? ”
“I was a policeman, ” he responded.
“What kind of policeman? ” St Peter asked.
“I was a traffic officer. I kept the roads and highways safe for travelers. ”
“Well done. Pass through the gates into paradise. ”
A few moments later a third man walks up.
“Welcome to heaven my son. What did you do with your life? ”
“I was a policeman, ” he responded.
“What kind of policeman? ” St Peter asked.
“I was a Military Policeman, Sir. ”
“Excellent my son, I have to leave for a bit, watch the gate will you? ”