passenger rear wheel locked

hi guys, thanks for your help and patience. Didn't mean to keep you in suspense but their were some family issues.
Got both the wheels off the ground, in neutral, the passenger side is still locked, the drivers side turns both ways but stiff. When I turned the drivers side wheel didn't hear anything noticeable. Tonight I noticed there is a wet oil spot at the bottom of the gear hub where it bolts on.
I gotta bad feeling about this.
What do I do next, pull the axle or the hub? or both? What to look for?
Could it be a seized bearing?