Sources:

M William Phelps OBSESSED

Snapped - Season 4 Episode 6 + Season 26 Episode 15

https://truecrimeny.home.blog/2019/02/10/love-and-murder-the-sheila-davalloo-story/

https://murderpedia.org/female.D/d/davalloo-sheila.htm

https://www.oxygen.com/snapped/crime-news/sheila-davalloo-killed-anna-lisa-raymundo-stabbed-paul-christos

https://www.ranker.com/list/facts-about-sheila-davalloo/cat-mcauliffe