Supernatural(TV Series) What Happened To Jo?

What happened to the blonde chick Jo (Ellen's daughter/Blonde girl good with a knife/blonde girl that was in the tavern) in season 2 after the episode where Sam gets possesed and then when Dean saved her she gave Dean some pain medications and then says to herself some mumbo jumbo. They never told what she meant by... show more What happened to the blonde chick Jo (Ellen's daughter/Blonde girl good with a knife/blonde girl that was in the tavern) in season 2 after the episode where Sam gets possesed and then when Dean saved her she gave Dean some pain medications and then says to herself some mumbo jumbo. They never told what she meant by that and then she just kinda dissapeared from season 3? and 4? so what happened to her...anyone know?
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