Speaking of back door, a story.
In the 80's I was locked up with a pair of Greek-American armored car robbers. The dad of one of them was there too, only implicated because he hid some of the money. The dad didn't speak very good English. He suffered from hemorrhoids. At 7:00 AM there was "pill line" where you could get Tylenol or whatever, or possibly convince them that you needed to see a doctor. The dad went to pill line, and told the nurse through the hole in the glass, "pain in back, pain in back." She slid a tube of Bengay under the glass. A little later he was in severe distress.
P.S. - one of the cousins later sold the story of their heist, and a movie was made about their misadventure, called "Empire State" (2013)