ex post facto, and it is unconstitutional. If that is indeed what happened to Delay, then his lawyers should have no trouble getting the conviction overturned.
ex post facto adj. Latin for "after the fact," which refers to laws adopted after an act is committed making it illegal although it was legal when done, or increases the penalty for a crime after it is committed. Such laws are specifically prohibited by the U. S. Constitution, Article I, Section 9.