Josh Mankiewicz

Join the party as Dateline celebrates some of its most memorable moments from the past 20 years and catches up on some of the show's most amazing stories. With Lester Holt, Ann Curry, Jane Pauley, Tom Brokaw, Matt Lauer and Hoda Kotb. Plus outstanding reporting from Chris Hansen, Josh Mankiewicz, Keith Morrison and Dennis Murphy. Tuesday at 10pm/9c.

It s an element of basic police work- the photo lineup. The technique is used in the pursuit of justice, but some advocates for the accused and even some law enforcement officials are challenging the technique. Nationwide, 75 percent of prisoners exonerated by DNA evidence were originally convicted on the basis of faulty eyewitness identification. NBC News Correspondent Josh Mankiewicz reports.

Dec. 3: In an interview to air on DATELINE, Gary Giordano tells NBCs News Josh Mankiewicz that he probably would not have been held in Aruba for suspicion in the disappearance of Robyn Gardner as long as he was if he had not made the decision to buy life insurance covering himself and his traveling companion before the trip.