Proctor v. United States

legal impossibility of burglary because defendant was present in the building with the consent of the landlord no defense to the crime of attempted burglary | independent corroboration of innocent facts can predicate a finding of probable cause for the warrant | conviction of attempted bank robbery under 18 U.S.C. Sec. 2113(a) | conviction of attempted bank robbery under 18 U.S.C. § 2113(a) | wherein the court held that "either type of conduct [reconnoitering or possession of materials to be used in the crime], standing alone, was sufficient as a matter of law to constitute a 'substantial step' if it strongly corroborated [the accused's] criminal purpose"