(m. 2003; died 2005)
In 2003, Stacey married David Castor, whose surname she bears. Castor was the owner of an air conditioning installation and repair company, and Stacey served as his office manager. In August 2005, at 2:00 p.m. one afternoon, Castor called her local sheriff's office to tell them that her husband had locked himself in their bedroom for a day following an argument and was not responding to his cell phone. When he did not appear at their shared workplace, she had become worried. She claimed he was depressed. Unable to get a response, Sergeant Robert Willoughby of the Onondaga County Sheriff's Department kicked in the door of the bedroom and found David Castor lying dead. Among the items near his body were a container of antifreeze and a half-full glass of bright green liquid. Willoughby says he remembers that Castor screamed, "He's not dead, he's not dead."
The coroner reported that David Castor had committed suicide through a self-administered lethal dose of antifreeze, but when police found Stacey Castor's fingerprints on the antifreeze glass and located a turkey baster that had David Castor's DNA on the tip, they began to suspect Stacey Castor had engineered her husband's death. They believed Castor had used the turkey baster to force-feed him once he became too physically weak.
The detectives on the case ordered wiretappings on Castor's house. They listened in on phone calls for any unusual conversations. In addition, they set up cameras overlooking Castor's house and her husbands' gravesites, who had been buried side by side at Castor's request. Detectives reasoned that if Castor were truly genuine about her love for her late husbands, then she would eventually visit their graves] They wanted to observe her behavior while there. Castor, however, never visited. The investigators soon felt the only way to prove Castor responsible for both homicides was to have Wallace's body exhumed. A toxicology screening ruled that Wallace had also been killed through antifreeze poisoning.