Maricopa County sheriff's detectives have arrested an 85-year-old Sun City man on an attempted murder charge.
When authorities arrived at the scene near 107th Avenue and Del Webb, they found his 81-year-old wife shot in the head.
Sheriff's spokesman officer Christopher Hegstrom says George Sanders is being held at the Fourth Avenue Jail.
Hegstrom says Virginia Sanders was transported to an area hospital for treatment after Friday night's shooting.
No information was released on the circumstances surrounding the shooting.
This is a developing story. Stay with FOX 10 News for updates.
The Associated Press contributed to this story.