Mary Carlson

Photo of a woman with fair skin, slightly suntanned, wearing a white tank top and sitting in a wheelchair. Her shoulder-length hair is straight and gray. The photo is somewhat blurry.Name: Mary Lynn Carlson.
Died: April 21, 1997.
Age at death: 53.
Cause of death: Stabbed.
Location: Maricopa County, Arizona, USA.
Disability: Multiple Sclerosis.

Details:
Mary Lynn’s son and daughter-in-law had promised to care for her in exchange for room and board, but instead neglected her and spent her money. When Lynn moved into an assisted-living facility, they took out a life-insurance policy on her and hired two fellow lodgers to kill her. They stabbed her to death.

Case status:
Doris Ann Carlson (Daughter-in-law), convicted of murder, sentenced to death; sentence reduced to life without parole.
David Carlson (Son), conspiracy to commit murder, life sentence.
Scott Smith, second degree murder, 10 years.
John McReaken, first degree murder, life sentence.

Source:
Woman Hires Men to Brutally Kill Bedridden Mother-in-Law with Multiple Sclerosis
Darling Doris was a Deadly Daughter-in-law
Doris Carlson | Murderpedia, the encyclopedia of murderers