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20/20 Special Edition: Sadistic Stalker

Published: 7:47AM Monday February 14, 2011 Source: 20/20

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She was the text book victim and he was a stalker of the worst kind.

Playing the victim card himself, he reeled her in, befriended her, and then, turned into a potentially deadly 24/7 nightmare.

20/20 tells the story of Anthony Berstow, a sadistic stalker who toyed with his victim, Tracey Morgan, making her life a living hell - her every move watched, her house bugged, her family threatened and all the while the police powerless to help. For nine long years Berstow watched and waited.

Tracey's refusal to be beaten by her tormentor is a brave and compelling story that turned the law on its head.

20/20 - Thursdays, 9.30pm on TV2 - the best of New Zealand and international current affairs, presented by Sonya Wilson, Pete Cronshaw and Beth Bates.