An Arlington man was assaulted and stabbed in his own yard on a snowy January morning. He died three days later, but police never caught the killers. More than 20 years later, the case remains unsolved.

Hugo Long, 52, and his wife usually parted ways each morning when he left for his Fairfax County government job as a building inspector, and she took a bus into Washington, where she worked for the U.S. State Department.