[Teknoman117]

Maybe this is an unpopular opinion, I don't know.

Presumably if they were let out of prison it's been decided that they are not longer a risk or have paid their debt to society.

So no, convicted murderers should not be prevented from being a cashier, nor any other job they qualify for. At any rate, the best way to steer someone back into crime is to take away their ability to have a job. How else are they supposed to survive?