A volunteer school worker in Brooklyn was arrested Thursday and charged with endangering the welfare of a child. To beat it all, he was also a former "American Idol" hopeful.

Cops say "Idol" reject Colin Leahy had inappropriate conduct with male students at P.S. 236 in Mill Basin.

The department says an ongoing investigation found Leahy had a relationship with a 12-year-old boy through text messages containing sexual references.

The investigation found Leahy also made sexual comments to a 10-year-old student whom he took to the movies at least twice, where a second 10-year-old boy joined them.

Leahy is charged with two counts of endangering the welfare of a child. He has also been blacklisted as a Department of Education volunteer.

You could tell Colin as a little slow when he appeared on season 3 of "American Idol" comparing himself to Clay Aiken.