Police in the Phoenix suburb of Scottsdale have determined that a shooting Thursday that killed two women and one man was a murder-suicide. According to Scottsdale Police Sgt. Ben Foster, the incident is believed to have been started by a “family disagreement.”

Police responding to the shooting identified two people, Roger Lee Paris, 50, and his sister, Cheryl P. McCarthy, 53, outside of the home. A third body found later in a nearby vehicle was identified as Paris' aunt Donna M. Archer, 76.

Authorities have determined that Paris first suffocated Archer in the vehicle and then shot McCarthy in the home’s driveway with a handgun. Paris later died by a self-inflicted gunshot wound.

Scottsdale police have not revealed the nature of the conflict that led to the killings nor any other details.

This is the second murder-suicide in Scottsdale in recent weeks. In late April, Tammy Welch, 50, was pronounced dead at the scene in the Cholla Park neighborhood, while her ex-husband Lawrence M. LaBine, 59, was taken to a hospital where he died from his injuries. LaBine, a financial advisor who faced litigation from the Securities and Exchange Commission, shot Welch while she was in her car.

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