496 U.S. 292 496 U.S. 292 110 S.Ct. 2394 110 L.Ed.2d 243 ILLINOIS, Petitionerv.Lloyd PERKINS. No. 88-1972. Argued Feb. 20, 1990. Decided June 4, 1990. Syllabus Police placed undercover agent Parisi in a jail cellblock with respondent Perkins, who was incarcerated on charges unrelated to the murder that Parisi was investigating. When Parisi asked him […]