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COMING UP ON "DATELINE"

FRIDAY, MARCH 19

Police believe a young widow is behind the deaths of two men, in two towns, hundreds of miles apart. But ten years later there are new questions, and a new ending. Hoda Kotb reports.

Dennis Murphy reports on the brutal murder of aspiring Playboy model, Paula Sladewski, in Miami this past New Years. Included in the report are never seen before photos and home video, as well as in-depth interviews with her boyfriend, Kevin Klym, and bouncers from the club where Sladewski was last scene alive.

SUNDAY, MARCH 21

Chris Hansen reports on the shocking things people can be persuaded to do in "What Were You Thinking?"