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ERIN CAFFEY: Plotted murder of her whole family

Erin Caffey was raised in a close-knit, deeply Christian family from small-town Texas. Her father Terry was a lay preacher, married to childhood sweetheart Penny. As well as Erin, the couple had two sons, Matthew, 13, and Tyler, eight. Erin had a nice, normal life – her parents allowed her to go out with friends, date boys and even bought her a car. So, why – at the age of 16 – did she plot the BRUTAL MURDER of her entire family?