Did he go to Attica or to a minimum security prison?
I don't know. It was a joke. But I imagine he would have gone to some minimum security camp. If he was in a medium or max security prison he would be segregated in a protective custody (PC) unit, him being a cop. If that was the case it could explain a weight loss. PC inmates are kept in a highly secure block or pod. They don't leave except for exercise in their own fenced-in yard. Snitches, transvestites and other unpopular convicts live in this unit. Their meals are brought to them in their cells. Often inmates in the kitchen will sabotage PC’s food in ways you can imagine.