I. Kathleen Hagen (English Wikipedia)

Gootman, Elissa (2000-08-28). "Parents Dead, Former Doctor Is Now Suspect". The New York Times. Retrieved 2010-05-04.
Peterson, Iver (2000-08-30). "Mental State Is Considered in Dual Killing". The New York Times. Retrieved 2010-05-04.
Hanley, Robert (2002-02-01). "Doctor Who Killed Parents Is Found Insane, Not Guilty". The New York Times. Retrieved 2010-05-04.

Kleinfeld, N. R.; and Peterson, Iver. "An Achiever's Unraveling; Fall of Doctor Accused of Killing Her Parents", The New York Times, September 4, 2000. Accessed July 23, 2018. "Dr. Idella Kathleen Hagen liked to be at the center of things, and now she was at the center of an entirely unbidden world.... She graduated from Chatham High School in 1963."