The crazy couple claimed they were running from "Hollywood star whackers" which they said had killed Heath Ledger and David Carradine.
But the Santa Barbara DA wanted to bring them back to California, where they faced charges of felony vandalism after being accused of smashing up a home they were renting.
But the US department of justice denied the attempt to extradite them, who said the resource-intensive and lengthy process involved and says extradition is generally reserved for more serious offenses.
The Quaids' legal counsel, Catherine Sas, says the extradition denial is consistent with what her clients have been saying all along - that they've done nothing wrong.
The couple crossed into Canada last October and sought refugee status, claiming "Hollywood star whackers" were out to get them too.
And Evi Quaid was found to be the daughter of a Canadian and gained citizenship and she's now sponsoring her husband.
The Quaids will be arrested if they return to the U.S. because warrants for them are still in effect.