On February 5, 2009, Castor was found guilty of second degree murder in the poisoning death of David and of attempted second degree murder for overdosing her daughter Ashley with drugs and vodka. With a “jam-packed” courtroom, most were focused on Castor. She, however, had her eyes closed as the verdicts were read. Her lead defense counsel, Keller, announced that Castor would appeal the verdict, including challenging the inclusion of evidence regarding the death of her first husband, for which Castor had not been charged.
On March 5, 2009, at Castor’s sentencing, Chief Assistant District Attorney Christine Garvey asked Fahey to impose the maximum consecutive sentences because of the brutality of David’s death. Further, she criticized how Castor had “partied in her backyard with friends like nothing was happening” as Ashley was comatose in her room. “She is cold, calculating and without any emotion for what she has done,” she stated. “Human life is sacred. Stacey Castor places no value on human life, not even her own flesh and blood. To Stacey Castor, human beings are disposable.”
On April 24, 2009, ABC aired a two-hour 20/20 special about Castor and the trial, which included interviews. During the trial, Castor had been dubbed “The Black Widow” by media outlets, a title previously given to Lynn Turner. Ashley said that she does not know how her mother, any mother, could try to kill her own child, a question that the public has also pondered. Castor, who professed to being shocked at the guilty verdict, maintained her innocence during the on-air 20/20 special, as well as in unaired parts of the program. She said that “Ashley brought this on” and insists that she and Ashley know what really happened. She did express sympathy for her daughter Bree. She called Bree an innocent victim, whom she lost along with her freedom and her husbands. She indicated that her mother, stepfather and some other relatives still support her.
ABC interviewed forensic psychiatrist Dr. James Knoll for psychological perspective on the case and he answered viewers’ questions via video on April 23, 2009, and via site comments on April 27, 2009. He stated that while most suicide notes focus on themes of remorse and the person not being able to go on with life, the note supposedly written by Ashley was focused on taking the blame off of Castor. He said that this theme was repeated fourteen times within the note and that he believes Castor will never admit to guilt of the murders. The code of murderers such as these, he said, is “deny, deny, deny” until the bitter end. When asked if Castor’s behavior and body language on the stand shows any sort of clue about her mental state and guilt, Knoll reminded that body language and behavior can be affected by events during a trial (such as “side effects of medications, anxiety, fatigue and attorney instructions to the defendant on how to behave”) and that their interpretation is not always reliable.