A judge on Monday ruled that former NBA player Antoine Walker, pictured in 2007, must stand trial over unpaid gambling debts of nearly one million dollars to three casinos. (AFP)

LAS VEGAS, Nevada (AFP) – A judge on Monday ruled that former NBA player  Antoine Walker must stand trial over unpaid gambling debts of nearly one million dollars to three casinos.

Walker didn't speak on Monday as he appeared with his attorney, Jonathan Powell, before Las Vegas Justice of the Peace Melanie Andress-Tobiasson.

The 33-year-old Walker, who won an NBA title with Miami in 2006, remains free without bail until his June 30 arraignment in state court.

Andress-Tobiasson noted that Walker hasn't made any progress repaying some $770,000 he owes on a promise last November to pay $905,050 in restitution, court fees and penalties.

Andress-Tobiasson bound Walker over for trial in Clark County District Court on three criminal charges of writing bad checks. If convicted, Walker could face up to 12 years in prison on the combined charges.

The charges stem from one million dollars in casino markers, or gambling loans, that Walker used between July 2008 and January 2009 at Caesars Palace, Planet Hollywood and the Red Rock Resort.

Under Nevada law, the unpaid markers are treated as bad checks.