(NBC News) A former Boy Scout who says he was sexually assaulted when he was 10 by his now-imprisoned former troop leader sued the Boy Scouts of America on Tuesday, citing recently released files the group secretly maintained on suspected molesters in its ranks.

The lawsuit claims that the Boy Scouts allowed Thomas Hacker, a Scout leader barred from the group after a 1970s felony sex abuse conviction in Indiana, to rejoin as a volunteer in Illinois in the 1980s, and he went on to molest more boys, including the plaintiff.

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