460 U.S. 276 460 U.S. 276 103 S.Ct. 1081 75 L.Ed.2d 55 UNITED STATES, Petitionerv.Leroy Carlton KNOTTS. No. 81-1802. Argued Dec. 6, 1982. Decided March 2, 1983. Syllabus Having reason to believe that one Armstrong was purchasing chloroform to be used in the manufacture of illicit drugs, Minnesota law enforcement officers arranged with the seller […]