The pageant has been investigating whether the 21-year-old San Diego native violated her contract by making public appearances with groups opposed to same-sex marriage. Prejean also failed to reveal to organizers that she posed in her underwear as a teenager.
Pageant organizers have scheduled a news conference on the matter for later Monday. There's no word on whether Miss USA contest owner Donald Trump will disqualify Prejean as first runner-up in the national contest.
The state pageant's runner-up, Tami Farrell, is expected to attend the news conference.
Copyright 2009 The Associated Press.