Howard County police warned on Thursday that Jeffrey Allen Burnham, 46, of Cumberland should be considered "armed and dangerous."
Police believe Burnham murdered his brother, Brian Robinette, 58, and sister-in-law Kelly Sue Robinette, 57 in Ellicott City on Thursday.
According to law enforcement, he killed the pair after shooting 83-year-old Rebecca Reynolds to death in a home in Allegany County.
They say Burnham was located around 9 a.m. on the side of the road in Davis, W. Va. next to a 2007 red Corvette he allegedly stole from his brother.
West Virginia State Police took Burnham into custody, and also recovered a gun from the vehicle.
Howard County police say Burnham is awaiting extradition from West Virginia.
They’re still investigating the case, and trying to determine what might have motivated him.