3.James and Susan Carson

https://www.huffpost.com/entry/jenn-carson-serial-killer-father_n_5ad4f388e4b0edca2cbcc29a
https://www.change.org/p/no-parole-for-san-francisco-witch-killers/u/23122711
https://murderpedia.org/male.C/c/carson-james-clifford.htm
https://books.google.ca/books?id=zQVlzgAACAAJ&dq=michael+bear+carson&hl=en&sa=X&ved=0ahUKEwj6vtuG7NbkAhWBnFkKHRH2DAQQ6AEIKjAA
https://books.google.ca/books?id=JzcnjwEACAAJ&dq=michael+bear+carson&hl=en&sa=X&ved=0ahUKEwj6vtuG7NbkAhWBnFkKHRH2DAQQ6AEIMDAB
https://books.google.ca/books?id=GTRQDwAAQBAJ&printsec=frontcover&dq=michael+bear+carson&hl=en&sa=X&ved=0ahUKEwj6vtuG7NbkAhWBnFkKHRH2DAQQ6AEIOzAD#v=onepage&q&f=false

2. David and Michelle Knotek

https://murderpedia.org/female.K/k/knotek-michelle.htm
https://murderpedia.org/male.K/k/knotek-david.htm
https://caselaw.findlaw.com/wa-court-of-appeals/1430291.html
https://products.kitsapsun.com/archive/2003/08-14/228867_couple_charged_with_murder_in_d.html
https://www.findagrave.com/memorial/119827321/kathy-loreno
https://news.google.com/newspapers?nid=2026&dat=20030815&id=ysYjAAAAIBAJ&sjid=OdEFAAAAIBAJ&pg=1198,1978637
https://www.imdb.com/title/tt1657267/

1. Susie Newsom and Fritz Klenner

https://www.greensboro.com/news/crime/summerfield-slaughter-years-ago-ended-in-deaths-of-couple-two/article_5e74b69a-04af-11e5-9534-1393729c4a3c.html
https://www.imdb.com/title/tt5225812/
https://murderpedia.org/male.K/k/klenner-frederick.htm
https://www.findagrave.com/memorial/9421073/frederick-robert-klenner
https://www.amazon.ca/Bitter-Blood-Southern-Madness-Multiple/dp/0451402103