507 U.S. 87 507 U.S. 87 113 S.Ct. 1111 122 L.Ed.2d 445 UNITED STATES, Petitionerv.Sharon DUNNIGAN. No. 91-1300. Argued Dec. 2, 1992. Decided Feb. 23, 1993. Syllabus* At respondent’s federal trial for conspiracy to distribute cocaine, the Government’s case-in-chief consisted of five witnesses who took part in, or observed, her cocaine trafficking. As the sole […]