If someone does a crime but there was no law against it at that time, do they get caught if a law is set up for it in the future?

Question

So for exemple if someone got on with a minor at the past, or if someone was openly racist in the 50s, would they be jailed now if they were alive, or do laws apply to the time you commited the crime?

In: Other

Answer 1

I wonder how much $ in retroactive taxes the USA would have to pay to the UK if a new tax law was brought in to the UK tomorrow?