An in-depth look at the tragic and gruesome fraternity death of 19-year-old Penn State University student Tim Piazza; his murder led to one of the largest criminal indictments in history against a fraternity and its members.

Jim Sciutto and Pamela Brown present live reaction and analysis of James Comey's first interview since being fired as F.B.I. director. This follows "James Comey - An ABC News Exclusive Event Interview" just broadcast with George Stephanopoulos interviewing Comey.

Anderson Cooper moderates a conversation between James Comey and a live audience; they discuss his FBI career, his public firing, and the high profile cases he oversaw, including the bureau's handling of the Hillary Clinton email investigation.