Robert Henry, an executive in Tacoma, is murdered in 1995 by a masked gunman. His wife tells police she thinks he was killed by a former business associate.
When Theresa Wesolowski is killed in 1999, police are baffled for nearly 10 years. They get a break in the case when a new DNA technique identifies a colleague.
When Gayle Isleib is shot dead in 1996, police identify a co-worker. Evidence is found of stalking, plans to kidnap her, murder her husband and love poems to Gayle.
When Alice Hufnagle is raped and murdered in 2002, police initially question her estranged husband. But, clues eventually lead to her colleague at a local pharmacy.
Sandy Berfield is killed after suffering years of harassment from a co-worker and has him jailed for violating a restraining order. Released, he sends her a bomb.
When Leesa Nascimento is killed by a shot in the head, a recently sacked co-worker, is traced after evidence is found that ties him to the murder.