(a)
Wherever in this title it is an element of an offense that—
(1)
any property was embezzled, robbed, stolen, converted, taken, altered, counterfeited, falsely made, forged, or obliterated; and
(2)
the defendant knew that the property was of such character;
such element may be established by proof that the defendant, after or as a result of an official representation as to the nature of the property, believed the property to be embezzled, robbed, stolen, converted, taken, altered, counterfeited, falsely made, forged, or obliterated.