Springfield, MO — U.S. Marshals track down a Tulsa homicide suspect in Springfield, Missouri.

Nicholas Gibson was arrested Wednesday after a traffic stop.

His common law wife, Ruth Blair, was arrested yesterday after a 10-hour standoff at a home.

The two are charged in the death of 53-year-old Michael Bender in south Tulsa.

He died from a gunshot wound to the head on July 27.

Police believe the motive was robbery.