The Murder of David Castor

Stacey Castor seemed to be in a panic when she called the police to report that her husband, David Castor, didn't make it into work. She told them he'd been feeling depressed, and was concerned it was suicide. Police went to the Castor home and discovered David's body on his bed, dead from antifreeze poisoning. Based on Stacey's comments, they were primed to label it a suicide and call it a day. But one detective wasn't so sure, especially when he learned Stacey's first husband was also dead...

Sources:

Articles
ABC News | 'Black Widow' Stacey Castor Accused in Anti-Freeze Murder (Angela Chambers)

ABC News | Exhumed Body Reveals Stacey Castor's First Husband 'Didn't Just Die' (Angela Chambers and Jon Meyersohn)

NCBI | Gender Differentiation in Methods of Suicide Attempts

Medium | Stacey Castor Killed Two Husbands and Tried to Frame Her Daughter (Megan Ashley)

Oprah Daily | Hear Ashley Wallace of Poisoned Love Tell Her Story—in Her Own Words (Elena Nicolaou)

Wikipedia | Stacey Castor

CrimeNeverSleeps | Did "Black Widow" Stacey Castor Kill Her Father Too?

CNY Central | Stacey Castor Case Back in Court (Jim Kenyon)

Shows
20/20 | Season 41 Episode 23 Black Widow

Other
Suicide Letter Scan