What is Infamous Crime?

Legal Definition
A crime which entails infamy upon one who has committed it. Butler v. Wentworth, 84 Me. 25, 24 All. 456, 17 L. R. A. 764. The term "infamous" i. e., without fame or good report was applied at common law to certain .crimes, upon the conviction of which a person became incompetent to testify as a witness, upon the theory that a person would not commit so heinous a crime unless he was so depraved as to be unworthy of credit. These crimes are treason, felony, and the crimen falsi. Abbott. A crime punishable by imprisonment in the state prison or penitentiary, with or without hard labor, is an infamous crime, within the provision of the fifth amendment of the constitution that "no person shall be held to answer fur a capital or otherwise infamous crime uniess on a presentment or indictment of a grand jury." Mackin v. U. S.. 117 U. S. 34a 6 Sup. CL 777, 29 L Ed. 909. "Infamous," as used in the fifth amendment to the United States constitution, in reference to crimes, includes those only of the class called "crimen falsi," which both involve the charge of falsehood, and may also injuriously affect the public administration of justice by introducing falsehood and fraud. U. S. v. Block, 15 N. B. R. 325, Fed. Oas. No. 14,609. By tbs Revised Statutes of New York the term "infamous crime," when used in any statute, is directed to as construed as including every offence pun-isbable with death or by imprisonment in a state-prison, and no other. 2 Rev. St. (p. 702, § 31,) p. 587, § 32.
-- Black's Law Dictionary
Legal Definition
At common law, a crime involving fraud or dishonesty.