[Sandy]

But that still doesn't give the legislature or anyone else ex post facto power to change the laws that were in place when some event happenned in the past.

That's not true.

Suppose you commit a crime today and the statute of limitation is 7 years. Then suppose that, 5 years from now, the legislature changes the statute of limitation for your crime to 20 years. If you're caught 15 years after you committed the crime, you can still be prosecuted even though the statute of limitation was only 7 years at the time that you committed the crime.

[Still Thinking]

If you say that's what the law says, then I'll take your word for it, but I maintain it is not right, and violates at least the spirit of the prohibition of ex post facto laws.