Lawsuit alleges Powerball winner was blackmailed and given a losing ticket.

A California man is suing Powerball winner Edwin Castro for $2 billion, claiming he was blackmailed and falsely told the winning ticket "was a loser." The man, Jose Rivera, argues he's the rightful owner of the ticket, which he bought a day before the drawing. Rivera claims a man named "Reggie" stole the ticket and refused to return it. Castro, who won the jackpot and took home a lump sum of $997.6 million, denies the allegations. The California Lottery has said it remains confident that Castro is the rightful winner.