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Constitutional question: (Original Post) madamesilverspurs Jan 2016 OP
Define "ex post facto legal action" jberryhill Jan 2016 #1
 

jberryhill

(62,444 posts)
1. Define "ex post facto legal action"
Fri Jan 29, 2016, 08:09 PM
Jan 2016

What do you mean by that?

An ex post facto law is one which on its face makes something you did last week illegal, and purports to make you criminally liable for it.

For example, last week you spit on the sidewalk. This week, we make it illegal to have ever spit on the sidewalk, and we arrest you for spitting on the sidewalk last week. That kind of thing is prohibited.
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