The ruling followed 4 hours of testimony from police officers in separate hearings in a Northumberland County courtroom, pennlive.com reported Friday.
The hearing for Miranda Barbour, 19, was held in the morning, while the hearing for her husband, Elytte Barbour, 22, was conducted Friday afternoon.
They are charged with homicide in the November death of Troy LaFerrara, 42, of Port Treverton.
Officers testified the couple had confessed to connecting with LaFerrara through an ad on Craigslist. After he got into their car, police said Miranda Barbour stabbed LaFerrara 20 times while Elytte Barbour restrained him with a cord around his neck.
They left his body in an alley in Sunbury, investigators said.
Miranda Barbour came to a state police substation Dec. 3 and made a statement about the killing. Elytte Barbour went to the Sunbury police station and confessed his role in the crime Dec. 6.
Each is jailed without bond on charges of criminal homicide and robbery, conspiracy, aggravated and simple assault and possession of an instrument of crime.