In September, 2008, in Roanoke, Texas, 17-year-old Jennifer Bailey and her 13-year-old brother David made a gruesome pact with two other friends: they'd kill their parents, steal their cars and credit cards and flee to Canada. The friends' parents managed to survive. Susan Bailey wasn't so lucky. What led them to such gruesome behaviour? The answers will forever change our view of the happy family, our neighbours, our children - and the society that...