If a petitioner has been convicted of a serious crime or has engaged in a pattern of misconduct, is the petitioner required to demonstrate "unusual or outstanding equities"?

If the petitioner has been convicted of a "serious crime" or has engaged in a "pattern of misconduct," the petitioner may need to demonstrate "unusual or outstanding equities" and ordinarily must present evidence of rehabilitation to obtain discretionary relief. Id. at 806-07. "However, there are cases in which the adverse considerations are so serious that a favorable exercise [of discretion] is not warranted even in the face of unusual or outstanding equities." Yepes-Prado v. INS, 10 F.3d 1363, 1366 (9th Cir.1993).