tldr: DA1 says "we won't prosecute, so what did you do?" BC says "oh I did X, Y, and Z" DA2 says "gottem! we're charging you for X, Y, and Z" PA Supreme Cou

tldr: DA1 says "we won't prosecute, so what did you do?" BC says "oh I did X, Y, and Z" DA2 says "gottem! we're charging you for X, Y, and Z" PA Supreme Court says "err, yeah you can't do that. you can leave BC"