I don't want to waste our valuable space and time here with diversions into legal theory and practice ....... But, for those interested, the Wiki article on Double Jeopardy round the world is quite comprehensive and - imho - quite accurate. Suffice it to say that pretty much everywhere there are (limited) circumstances in which accused
can be tried twice for the same offence .......
https://en.wikipedia.org/wiki/Double_jeopardy