For two years, investigators had collected evidence against Castor for the deaths of her husbands. In 2007, she was arrested for
second-degree murder in David's death and for attempting to murder and frame Ashley. Prosecutors argued that Ashley's computer-written "suicide note" had actually been written by Castor. argued that David's "suicide" had never made sense given the lack of his fingerprints on the glass or container tainted with
ethylene glycol, a toxic substance found in antifreeze, and the turkey baster found in the kitchen garbage bearing both ethylene glycol and his DNA. She had said that her husband got the idea to kill himself with antifreeze while both were watching a news report about
Lynn Turner, who murdered two past lovers by using the poison. and had changed David's
will to exclude his son by a previous marriage from the money left to him by David. Fitzpatrick pointed out that Castor had never sought therapy for Ashley and that Ashley had never exhibited signs of mental illness. Fitzpatrick asserted that Castor's behavior during David's and Ashley's illnesses made no sense, given the years she had worked for an ambulance company. She did not seek care for Ashley for seventeen hours and indicated that David, who was staggering and vomiting and unable to stand, "looked OK". Fitzpatrick claimed this was the day Castor wrote the note, which had her fingerprints but not Ashley's, to frame her daughter. 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 Ashley. Keller announced that she would appeal the verdict, including challenging the inclusion of evidence regarding the death of Wallace, for which Castor had not been charged. Further, she criticized how Castor had "partied in her backyard with friends like nothing was happening" as Ashley was comatose in her room. For
forging David's will, he ordered Castor to serve an additional 1 to four years in prison. The trial had lasted for four weeks. An emotional Ashley told the judge she hated her mother "for ruining so many people's lives", but still loved her for the bond she had originally had with her. Fitzpatrick said that under New York sentencing guidelines, Castor would have to serve just over 51 years before she became eligible for
parole—at her age, effectively a life sentence. ==Aftermath==