The Pima County Sheriff's Department is investigating a death that occurred on the east side Saturday.
According to Ryan Inglett with PCSD, deputies responded a possible domestic violence incident in the 7400 block of South Cactus Thorn Lane at 6:45 p.m. Upon arrival they located 59-year-old Laurie Vandegrift dead inside her home.
Vandegrift had obvious signs of trauma and was the only person inside the home.
Inglett says that during a 9-1-1 call, a woman believed to be Vandegrift requested law enforcement and medical services before the phone quickly disconnected.
The number was called back and a man believed to be Vandegrift's 28-year-old son, Justin Vandegrift, answered claiming he had been arguing with his mother, but everything was ok.
Several hours later Justin Vandegrift was located and was arrested for homicide.
Stay with KGUN9 and KGUN9.com for more on this developing story.