How have the courts interpreted Section 1956 of the Criminal Code in relation to mail fraud allegations?

Gurs's first contention fails because 1956 does not require that the "specified unlawful activity" referred to in subsection (a)(1)(A)(i) be a conviction. Rather, it only has to be "an act constituting an offense" under 1341 (mail fraud). See 1956(c)(7)(A); 1961(1). Construing the evidence in the light most favorable to the prosecution, Jackson v. Virginia, 443 U.S. at 319, a rational trier of fact could have found beyond a reasonable doubt that the real properties, boat, and car at issue were purchased with the intent to promote the carrying on of the mail fraud evidenced by the three letters.