off of the program, they have been all african-americans. is that a coincidence? it's hard to tell. >> reporter: contestants including cory clark, disqualified after a battery arrest. and semifinalist jared andrews sent packing over an assault charge. ♪ and i don't need >> reporter: producers booted the twins after identify theft charges surfaced. and season nine, he was disqualified over questions whether he was still tied to a boy band. >> i don't recall a time when i felt discriminated against. >> reporter: season six finalist says the one thing "american idol" isn't is racist. three of the show's past winners are black. other contestants say singers are required to disclose arrests. season four's solomon says, i was clearly informed of all grounds for disqualifications