What is the current state of the law in this circuit on the doctrine of relying solely on the uncorroborated testimony of an accomplice?

This circuit has reiterated in many cases the rule in federal courts that an accused may be convicted on the uncorroborated testimony of an accomplice. Caminetti v. United States, 1917, 242 U. S. 470, 495, 37 S.Ct. 192, 61 L.Ed. 442. However, in most of those cases the opinions state or show that there was some independent evidence to corroborate the accomplice's testimony.¹ Those cases which rely solely on the rule to affirm convictions do not indicate in the opinions whether or not there was any independent corroborative evidence.²