A man police say sexually abused young girls for more than 40 years has been sentenced to 20 years in prison for producing child pornography.

65-year-old Ronald Little was caught in 2010 when pictures surfaced from his abuse of his teenage daughter, who he fathered when her mother was 13 in 1983.

Little documented the abuse in pictures and notes from each encounter. Those memoirs have resulted in 107 charges against him ranging from incest to sodomy.

Since those charges were filed, four other women have claimed to be victims of Little, but the statute of limitations has run out for three of them.