DID A HIT TV SHOW INSPIRE REAL LIFE MURDERS? "20/20" REPORTS, FRIDAY, MARCH 18 ON ABC

Plus: Superstar Jennifer Hudson

Is a television show and its main character giving some viewers the idea to act on dark thoughts? ABC News Correspondent Jay Schadler reports on two murders which may have been inspired by the hit TV crime show "Dexter." Schadler travels to Rising Sun, Indiana to interview Andrew Conley, who was convicted of killing his younger brother, Conner, and to Edmonton, Alberta in Canada, where Mark Twitchell is currently on trial for the murder of John Altinger. Twitchell, a filmmaker who made a short film about a fictional murder in a garage, is alleged to have returned to the garage to commit murder for real. It's alleged that his movie script may have been a template for an actual homicide. The report airs on "20/20," FRIDAY, MARCH 18 (10:00-11:00 p.m. ET) on the ABC Television Network.

Plus: Jennifer Hudson is a former "Dreamgirl" now living every girl's dream� At 29 she's got a baby boy, a fianc�, a second CD coming out next week, a major movie opening in the fall, and a slim new figure that landed her a job as a Weight Watchers spokesperson. How has she been coping with almost unprecedented success, and how has she dealt with a headline-making personal tragedy? Hudson opens up about it all in a candid and emotional interview with Deborah Roberts.

"20/20" is anchored by Elizabeth Vargas and Chris Cuomo. David Sloan is executive producer.