Victims
Elisabeth Congdon
Velma Pietila (no picture)
Find-A-Grave: Elisabeth Mannering Congdon
Granddaughter honors Congdon heiress with memoir
Suspect Arrested In Millionaire’s Murder
‘Struggling Rancher’ Held In Killing Of Duluth Heiress
Minnesota Man Guilty In Slaying Of In-Law, Nurse
Caldwell convicted of murder
Roger Caldwell; Murder Figure in 1977 : Suicide Notes Claimed Innocence, Blamed Problems on Notoriety
Wikipedia: Elisabeth Congdon
Wikipedia: Glensheen Historic Estate
Twists, turns never end for Congdon murder case figure
Minnesota’s Most Infamous Heiress: The Newest Chapter
Books
Nightingale: A Memoir of Murder, Madness, and the Messenger of Spring
Glensheen’s Daughter: The Marjorie Congdon Story
Movies/Documentaries
Mansions & Murder: Goodnight Nurse
Marjorie Congdon Caldwell
Roger Caldwell
