Last week some prisoners in California and across the U.S. announced a strike over poor wages for the work done in prison.

That includes jobs like cooking and dishwashing. But what are the rules around working for inmates and how has it changed over the years? 

For a look at some of that history, Alex Cohen talks to Karamet Reiter, Professor of Criminology, Law and Society and Law at the University of California at Irvine.