According to ABC News, Castor did not seem phased by her husband’s cause of death. One detective noted that she said, “David had been depressed because he had recently lost his father — and that possibly his drinking and suicide that weekend was as a result of him being depressed about his father’s death.” Oxygen states that a medical examiner also ruled that David had killed himself using a bottle of antifreeze that was in his room. Despite this conclusion, the authorities were not entirely convinced. A search of the home turned up a turkey baster with traces of antifreeze. Furthermore, David, who had a son, had left everything in his will to Castor and her daughters.
It was becoming clear to detectives that Castor had likely played a role in David’s death (via ABC News). Oprah Daily reports that this theory gained traction when investigators looked into Castor’s first husband’s death. As Detective Dominick Spinelli put it, there were “certain similarities” in both cases. For one, it was determined that Wallace’s symptoms correlated with antifreeze poisoning. Per A&E, investigators then decided to exhume Wallace’s body to look for signs that he too had died from ingesting antifreeze. When his remains were examined, they found that his organs were covered in crystals. This indicated that Wallace had indeed died from antifreeze poisoning.
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ABC News writes that investigators zeroed in on Castor and questioned her about David’s death. That’s when she accidentally told investigators, “I poured him the antifree — I mean cranberry juice” (per Oxygen).
