O.J. Simpson arrives at courthouse with a smile

Opening statements have begun in O.J. Simpson’s trial on charges that he robbed two sports memorabilia dealers in Las Vegas a year ago.

Prosecutor Chris Owens has begun outlining the case against Simpson, who flashed a thumbs-up sign as he arrived at the courthouse Monday.

Simpson and co-defendant Clarence “C.J.” Stewart have pleaded not guilty to 12 charges including kidnapping, armed robbery and conspiracy.

Simpson’s defense claims he was trying to retrieve personal property.

Both defendants could face life in prison with the possibility of parole if convicted of kidnapping and mandatory prison time if convicted of armed robbery.