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THE TRUTH IS SOMEWHERE RIGHT BETWEEN THE LIES, ON "20/20"

Airing Friday, October 17, on ABC

Who killed Greg Williams, a prosperous Keller, TX entrepreneur who was shot to death in his own home? His third wife, Michelle Williams, tells police she remembers seeing an intruder dressed in black enter the house, hit her with a wrench, and then shoot Greg with his own gun. But no valuables were stolen, and the evidence is laid out so cleanly the scene looks staged. As police start to peel back the fa�ade of the Williams' happy life, they uncover their secret world of shady business, duplicity, and kinky sex. Could Michelle be covering for one of the many people in Greg's life who hated him and could potentially be the killer? Or perhaps it was her hand on the trigger. Matt Gutman interviews Michelle's two sons, the police, and attorneys who pursued this bizarre case to its end. "20/20" airs FRIDAY, OCTOBER 17 (10:01-11:00 p.m., ET) on the ABC Television Network.

Plus: Tawny Blazejowksi is a one-of-a-kind stalker who not only set her sights on her ex-boyfriend, Joe Good, but on just about everyone he knew, from his current girlfriend's daughter and landlord to his neighbor. If felt wronged by anyone, Blazejowski would allegedly take revenge on her keyboard and spread vicious lies about them on the internet - lies so convincing that it ruined the lives of the people she felt crossed her. Blazejowski detailed her plots in notebooks whose entries were copied and given exclusively to ABC News. Matt Gutman's report includes interviews with Tawny's victims, including Joe Good.

"20/20" is anchored by Elizabeth Vargas and David Muir. David Sloan is senior executive producer.