From TMZ:

Sources connected with the show tell us … the contestant — one of the final 12 — was charged with 2 crimes in 2011, one involving violence.  We’re told in both cases the contestant gave a fake name to cops when arrested.

In addition, we’re told the contestant has outstanding warrants — again, the singer concealed it from producers.

Update: The contestant in question is “Gentle Giant” Jermaine Jones:!/LaurenAMorris/status/179755580477546496

Jones reportedly tweeted that he is off the show: “Awww I will no longer b on the show.”

Jones subsequently deleted the tweet, but several blogs got screencaps and many  Twitter users retweeted it before it was removed: