I heard on the local news that incarcerated people are not allowed to take and use their 'medical' marijuana in jail or prison and some of the pot card carriers are mad about this.
Each jail or prison is different and have different rules and some do not allow any narcotic medications to be taken by the prisoners. So if you come to jail and your doctor had you on pain pills for whatever reason, you will be in detox because you won't be getting it at some of these jails/prisons as seen in this article.
So do you really think that if the jails/prisons aren't going to allow you pain pills/narcotic meds that they are going to allow you to smoke weed in the facility just because you have a card and call it, "medicine"? Of course not, that would be ridiculous.
Maybe you should have thought about that before you committed the crime that put you there.