Authorities say a husband and wife accused of the killing of a retired Northern California school teacher and wanted for a Southern California crime spree are a step closer to being returned to California to face charges.

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Authorities say a husband and wife accused of the killing of a retired Northern California school teacher and wanted for a Southern California crime spree are a step closer to being returned to California to face charges.

Hercules police spokeswoman Connie Van Putten says warrants were filed Wednesday in Contra Costa County Superior Court charging 24-year-old Darnell Washington and his wife, 25-year-old Tanya Washington, with the murder of Suzie Ko.

Several other charges were also filed against the couple including robbery, carjacking and burglary. Darnell Washington was also charged with being a felon in possession of a firearm.

The Washingtons are being held in King County, Wash. after being arrested outside of Seattle less than a week after the 55-year-old Ko was found dead on the floor of her home on Oct. 5.

An extradition warrant was also filed Wednesday seeking to have the couple returned to California.