The Skateboard Murder Mystery

The owner of the legendary sapphire, the Eye of Solomon, is Ellary Queen, who also owns the Red Eagles football team. Lupin, coming for the sapphire as he declared he would, retreats for the time being when he finds Queen near death. Someone has already attacked Queen, attempting to hand him. According to the deduction of Bolonco, son of Detective Lt. Columbo, the sapphire has not yet been stolen. Who really dunit?