Effect of a Guilty Plea on Later Assertion of Rights
When plead guilty, creates wall:  automatic waiver of everything before guilty plea unless preserved
Fed system possible to get conditional GP
Blackledge v. Perry – D is essentially punished by P who is angry that D appealed, so he pursues as a felony instead of a misdemeanor as before; D is scared and pleads guilty
violation of DP, fundamental fairness… “vindictiveness”
P did not have authority to pursue the felony charges