Toraino Pridgen and his brother Satron Pridgen were convicted in 1999 in Massachusetts Superior Court of assault and battery with a dangerous weapon. The convictions followed their joint trial on charges stemming from an early morning shooting at a birthday party in Fitchburg, Massachusetts, on October 25, 1998. Toraino Pridgen has brought this appeal challenging the district court’s denial of his petition for a writ of habeas corpus under 28 U.S.C. § 2254. The writ alleged *733 denials of due process in the form of arguments that Pridgen was convicted on legally insufficient evidence, see Jackson v. Virginia, 443 U.S. 307, 99 S.Ct. 2781, 61 L.Ed.2d 560 (1979), and that his joint trial with his look-alike brother (who, in petitioner’s view, was asserting an antagonistic defense) rendered his trial fundamentally unfair, see Zafiro v. United States, 506 U.S. 534, 113 S.Ct. 933, 122 L.Ed.2d 317 (1993).

The parties clash over the appropriate standards of review and whether the joint trial issue is properly before us. But even if we assume arguendo proper issue preservation and the applicability of petitioner-friendly reviewing standards, we see no error in the district court’s denial of the petition. As petitioner recognizes, the conviction was appropriate if a reasonable jury could have found that petitioner was present at the scene of the crime with knowledge that his brother intended to commit the crime and, by agreement, was willing and available to assist his brother if necessary. See Commonwealth v. Bianco, 388 Mass. 358, 366, 446 N.E.2d 1041 (1983). 1 Here, the trial evidence warranted such a finding. There was testimony from which the jury could have concluded that petitioner, shortly after encouraging his brother to shoot another party guest, nodded to his brother just before his brother shot the victim. 2 This testimony tends to establish petitioner’s physical presence at the crime scene, his prior knowledge of his brother’s mens rea, and his personal intent to support his brother in the contemplated shooting crime. No more was constitutionally required to ground the conviction. 3

There also was no constitutional violation in permitting the brothers to be jointly tried. Petitioner’s only developed argument that a severance was constitutionally required proceeds from the premise that there was insufficient evidence to convict petitioner under a joint venture theory—a premise we have just rejected. Moreover, and in any event, a joint trial in the case of antagonistic defenses violates a defendant’s constitutional due process rights only if it compromises a specific trial right of the defendant or if it prevents the jury from making a rehable judgment about guilt or innocence. See Zafiro, 506 U.S. at 539, 113 S.Ct. 933 (elaborating a severance might be required where evi *734 dence is admitted that is probative of a defendant’s guilt but admissible only against a codefendant, or where evidence that tends to exculpate a defendant is excluded because of the presence of a codefendant). And here, petitioner has faded to establish either a deprivation of a specific trial right or that the jury’s judgment should be disregarded as unreliable.

For the reasons stated, we affirm, the denial of petitioner Toraino Pridgen’s petition for a writ of habeas corpus.

So ordered.