Supposedly the state never transported any wolves in to Washington State to reintroduce them, they migrated here all on their own.
The wolves that came here are really a smart creature, they installed radio collars on themselves so the State can follow their every move.
Then they spread almost all across the state into acknowledged wolf packs and unecknowleded wolf packs, plus they can transform into other spieces. Some one sees a wolf, takes a picture of catches it on a trail camera and the State says it's a family pet or a coyote.
If the wolves can reintroduce themselves then the jaguar can reintroduce themselves. Simple as that.