William Stevenson was arrested after being indicted on charges of first-degree murder in the death of his wife in December. He was married to Dr. Biden in the 1970s.
Ms. Guthrie, 84, was last seen on Saturday at her home in Tucson, Ariz. A sheriff said that investigators were treating her disappearance as a crime.
Better engineering has made the front seat much safer in head-on collisions. But the back seat hasn't kept pace. It's a problem one vehicle safety group is trying to solve.
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Nancy Guthrie is 84 and has mobility issues, but she is mentally sharp, Pima County Sheriff Chris Nanos said. She was last seen Saturday evening.
Today show co-host Savannah Guthrie, went missing on Sunday. While Nancy Guthrie has mobility issues, Sheriff Chris Nanos said that she "is of great sound mind. This is not a dementia-related" case.'/Open
'The major problem in this country today is the fascism in our streets'
'In love with me'
Live: Authorities give an update on the continued search for "Today" anchor Savannah Guthrie's missing mother, Nancy, who has not been seen since Saturday.
The drone "aggressively approached a U.S. Navy aircraft carrier with unclear intent," CENTCOM spokesman Capt. Tim Hawkins said