A medical examiner says a Fredericksburg deliveryman who was abducted and killed died from a stab wound to the chest.

The medical examiner on Tuesday identified a body found in a remote area of Sussex County as 24-year-old Yong Hui Zhang.

Fredericksburg police say Zhang had been missing since he was apparently ambushed behind an apartment building last Thursday night, while delivering food for his family's restaurant, China Express.

On Saturday, police arrested 34-year-old Jermaine Montgomery and his girlfriend, 36-year-old Marcey White at a Wal-Mart in Franklin, where they allegedly used Zhang's credit card. They face abduction, carjacking and credit card theft charges.

Both Montgomery and White are being held at Rappahannock Regional Jail without bond.