DERRY — A 79-year-old man has been charged with second-degree murder in the shooting death of his 74-year-old wife.

Around 12:03 a.m. Saturday, Roderick Munstis, 79, called 911 from his home at 151 N. Main St. in Derry, the Route 28 bypass, police said.

When police got to the home, officers found his wife, Ellen Munstis, 74, dead from multiple gunshot wounds.

Derry police detectives investigated with help from the Attorney General’s office. Munstis was taken into custody at the house before 1 a.m. Saturday.

Munstis has been charged with alternative counts of knowingly committing second-degree murder, and reckless second-degree murder for allegedly killing his wife.

Assistant Attorney General Ben Agati explained investigators found sufficient proof to suggest Roderick Munstis could have violated the law both knowingly and recklessly.

“The charge is the same, second-degree murder, regardless of whether the defendant acted knowingly, or recklessly with extreme indifference to the value of human life,” Agati wrote in an email. “Here, the court has found facts exist to support both standards.”

Roderick Munstis is expected to be arraigned Monday in Rockingham County Superior Court in Brentwood.

Police are not seeking anyone else in connection with the death. There is no threat to the public, Derry police said.

The Office of the Chief Medical Examiner will conduct Ellen Munstis’ autopsy on Sunday morning.

Anyone with information about the home or the incident is asked to call the Derry Police Department Detective Unit at 432-6111.