A statement from the Snohomish County Sheriff's Office identifies John Blaine Reed, 53, and his brother, 49-year-old Tony Clyde Reed, as potential suspects in the suspected murders of Patrick Shunn, 45, and his wife, Monique Patenaude, 46.
Described as "armed and dangerous," the brothers are convicted felons who detectives believe went on the run sometime last week, police say.
"Detectives were able to obtain video surveillance footage tying the Reed brothers to the disposal of Shunn and Patenaude’s vehicles," the statement says.
"Detectives believe the couple were the victims of homicidal violence based on evidence collected at the scene of the missing couple's vehicles, as well as the former residence of John Reed," it added.
Search and rescue teams continue to scour the area for any sign of Shunn and Patenaude.
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"The recovery of Patrick and Monique is our agency’s number one priority right now, for the sake of their families," Sheriff Ty Trenary said in the statement. "Our second priority is getting the Reed brothers into custody and off the streets."
The Reed brothers were last seen driving their parents' 2007 Volkswagen EOS Couples, according to investigators.
Snohomish County Sheriff's Office (2)
Anyone with direct information on the whereabouts of John or Tony Reed, or with information about the investigation into the alleged murder of Shunn and Patenaude, is asked to call the Snohomish County Sheriff's Office's anonymous tipline at (425) 388-3845.