Rosen v. United States

Rosen and Wagner (defendants) were charged, along with Broder, with conspiracy to receive stolen checks. Broder pleaded guilty and was called to testify against Rosen and Wagner, who objected that Broder was incompetent to testify under the old common-law rule barring testimony from anyone previously convicted of forgery. The district court allowed Broder to testify anyway, the defendants were convicted, and the court of appeals affirmed.