PHOENIX (AP) -
Montana authorities say a man suspected in the 2008 death of his ex-wife has been arrested in Phoenix.
The Montana attorney general's office says Walter Larson was arrested Wednesday morning while he was leaving his home for work.
He is being held on $500,000 bail pending extradition to Montana on charges of deliberate homicide and tampering with evidence.
Susan Casey of Glendive was reported missing on April 12, 2008. The 34-year-old woman's body was found in the Yellowstone River the next month near Fallon. Officials have not said how Casey died.
Larson was arrested two days after Casey's disappearance for violating a restraining order she had filed against him in 1998. A judge dismissed the charge because Larson had not been notified of the restraining order.
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