A 92-year-old United States mother, Anna Mae Blessing, has been charged with murdering her unnamed son, 72, because he planned to move her to a care facility.
Blessing told police "she removed the handgun and fired multiple rounds striking and killing her son".
"Complainant is saying that Anna is coming for her now, there's a lot of screaming", the 911 operator is heard saying in a recording. She allegedly shot him twice and then pointed the gun at his girlfriend.
"She still has a gun", the 911 operator was recorded telling dispatch.
Police said they had previously been called out to the property following a verbal altercation between Ms Blessing and her son.
Blessing was sharing a home with her son and his 57-year-old girlfriend in Fountain Hills, Maricopa County when the shooting happened on July 2.
She told authorities that she bickered with her son before drawing the firearms about how she was being treated and angered over his decision to move her out of his home and into assisted living, officials said.
Blessing hid two pistols in the pockets of her robe and shot her son several times in his bedroom, the sheriff's office said in a statement.
She pulled out a second pistol, which she told police her late husband had given to her in the 1970s. She's being held on a $500,000 cash-only bond.
But the elderly woman had become increasingly agitated after overhearing her son talking about placing her in a nursing home because she was "too difficult" to care for, authorities said.
When deputies got there, Anna Mae Blessing was sitting in her recliner, her son dead in the other room.
Police found Mrs Blessing in a reclining chair in her bedroom.
As she was arrested, she announced: 'You ended my life, so I'm taking yours'.
"It is always concerning when domestic issues escalate to violence or tragic outcomes", says Maricopa County Sheriff Paul Penzone. 'They are often isolated and neither predictable nor preventable'.
Blessing has been charged with a count of murder in the first degree, a count of aggravated assault with a deadly weapon and a count of kidnapping. She also said she should be "put to sleep" for her actions.