Article continues below advertisementJoseph Duggar was devastated upon discovering his brother Josh Duggar's child sexual abuse crimes over a decade before his own arrest for allegedly molesting a 9-year-old girl.Joseph, 31, denounced Josh's sexual abuse of five girls during a December 2015 episode of Jill & Jessa: Counting On."Whenever somebody you respect the most is willing to get up and proclaim what we believe as Christians, about being true to your wife, you'd never think that that's the person who's involved in it," the reality TV star said.