The Colorado man who butchered his pregnant wife and two toddler daughters told police he was “not a good man” as he confessed to coldly dumping their bodies in a “freakin’ oil tank,” according to documents released this week.

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Notes from interviews released Wednesday by the Weld County District Attorney’s Office show how investigators got Christopher Watts, who was sentenced to life in prison last week for the heinous killings, to confess after he failed a polygraph test.

For two days, Watts, 33, maintained that he had no clue what happened to his wife, Shanann, 34, and their two daughters, after they went missing on Aug. 13.

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