> knowingly used an illegal substance and got caught That can be a reason to believe they should remain imprisoned, but not a reason to believe they should be

> knowingly used an illegal substance and got caught That can be a reason to believe they should remain imprisoned, but not a reason to believe they should be released but it's not a priority to do that anytime soon. > over-estimating the amount of causal drug users in prison It's possible. The drug war has vastly increased prison populations, but it's hard to come by unbiased statistics about how many of those people committed any non-victimless crimes.