A Phoenix man has been arrested and charged in the shooting and killing of his mother in Ahwatukee.

Around 5:15 p.m. Wednesday a 911 operator received a call from a man who reported his mother had been shot and was dying.

Phoenix Police Department responded to the home near 5th Avenue and Chandler Boulevard and located 33-year-old Robert Kistner who was walking out from the home with his hands up.

According to police, Kistner was being placed in handcuffs and he stated that he shot his mother twice.

When officers entered the home they found the victim, 60-year-old Monique Kistner, unresponsive. Responding paramedics pronounced her dead.

Kistner did not provide any further statements and was booked into the Maricopa County Jail on charges of first-degree murder.

The investigation remains ongoing and detectives are trying to figure out a motive for the shooting.