In Blackledge v. Perry, 417 U.S. 21, 27-29, 94 S. Ct. 2098, 40 L. Ed. 2d 628 (1974), the Supreme Court explained how increasing a defendant's charge from a misdemeanor to a felony after defendant secured a new trial on appeal gave rise to a realistic likelihood of vindictiveness: A prosecutor clearly has a considerable stake in discouraging convicted misdemeanants from appealing and thus obtaining a trial de novo in the Superior Court, since such an appeal will clearly require increased expenditures of prosecutorial resources before the defendant's conviction becomes final, and may even result in a formerly convicted defendant's going free. And, if the prosecutor has the means readily at hand to discourage such appeals--by "upping the ante" through a felony indictment whenever a convicted misdemeanant pursues his statutory appellant remedy--the State can insure that only the most hardy defendants will brave the hazards of a de novo trial. 417 U.S. at 27-28.