Akinsade v. United States, 686 F.3d 248, *252 (4th Cir. July 25, 2012) (As a remedy of last resort, the writ of error coram nobis is granted only where an error is "of the most fundamental character" and there exists no other available remedy. United States v. Mandel, 862 F.2d 1067, 1075 (4th Cir. 1988). The writ is narrowly limited to "extraordinary cases presenting circumstances compelling its use to achieve justice." United States v. Denedo, 129 S. Ct. 2213, 2220 (2009) (quoting United States v. Morgan, 346 U.S. 502, 511 (1954)). Thus, the writ provides relief in cases where the error "rendered the proceeding itself irregular and invalid." United States v. Addonizio, 442 U.S. 178, 186 (1979) (internal quotation marks and citation omitted) (superseded by statute on other grounds). A petitioner seeking this relief must show that "(1) a more usual remedy is not available; (2) valid reasons exist for not attacking the conviction earlier; (3) adverse consequences exist from the conviction sufficient to satisfy the case
or controversy requirement of Article III; and (4) the error is of the most fundamental character." Hirabayashi v. United States, 828 F.2d 591, 604 (9th Cir. 1987).).