431 U.S. 174 97 S.Ct. 1823 52 L.Ed.2d 231 UNITED STATES, Petitioner,v.Rose WONG. No. 74-635. Argued Dec. 6, 1976. Decided May 23, 1977. Syllabus A witness who, while under investigation for possible criminal activity, is called to testify before a grand jury and is later indicted for perjury in the testimony given before the grand […]