Could be a axle bearing taking a dump, when you turn right it loads that axle, and that could be why you hear the sqeaking, if it's going bad, they usually start cutting a groove into the axle, i'd pull the wheel off and check it, it's possible it could be the brakes also, if the pads are worn, either way, if you pull the wheel, you ought to be able to trace it down. Good Luck,