It is a law that changes consequences of actions committed before the law was inacted. It may make things better or worse. it is sometimes not permitted with common laws.
"The term ""Ex Post Facto, in simple English, means ""After the Fact"", or in other words, retroactive. In criminal law, it can mean that laws cannot be applied retroactively."
An ex post facto law is one that is made retroactive to punish an act that wasn't illegal at the time it was committed. For example, if I didn't wear my seatbelt and wearing one wasn't a law, but it...
An example would be if a woman was driving in Illinois and the speed limit was 50mph. So she drove exactly 50mph. The passing police officer checked her speed and insured that she was going the good...