A California radiologist and his wife were found fatally shot outside their home on Sunday, and police say his son, who later died by suicide, is the main suspect in the homicide.

The Simi Valley Police Department said in a statement that officers responded to reports of gunfire at a residence in the area and found Eric Cordes, 63, and his wife, Vickie Cordes, 66, suffering from multiple gunshot wounds inside their open garage.

The couple was taken to a local trauma center, where they were pronounced dead.

Witnesses told detectives that the suspect approached the home’s open garage and opened fire before fleeing in a black sedan with out-of-state license plates, according to the police statement.

Detectives identified a car leaving the area and heading south that belonged to Keith Cordes, 37, the son of Eric Cordes and the stepson of Vicki Cordes, who is from Kentucky.

Police tracked the car to Chino and found that the owner of the car had set it on fire before fatally shooting himself.

While burns initially delayed the identification of the person inside the car, the San Bernardino County Medical Examiner was able to confirm that the deceased person was Keith Cordes and said he died from a self-inflicted gunshot wound.

The incident remains under investigation, but detectives believe the firearm found inside Keith Cordes’ car is the same one used to shoot Eric Cordes and Vicki Cordes.

The circumstances and motive of the double homicide are not immediately clear, police said.

Adventist Health Simi Valley confirmed in a statement to NBC Los Angeles that Eric Cordes worked at the hospital as a radiologist for nearly three decades.

“The Adventist Health Simi Valley community is heartbroken by the tragic deaths of our longtime colleague, Dr. Eric Cordes, and his wife, Vicki,” the statement said. “Dr. Cordes was a highly respected, board-certified radiologist and beloved physician who served this community with compassion and excellence for nearly 30 years.”

The hospital’s statement continued: “Our hearts are with his family, friends, and all who had the privilege of working alongside him as we grieve this shocking loss.”

If you or someone you know is in crisis, call or text 988 to reach the Suicide and Crisis Lifeline or chat live at 988lifeline.org. You can also visit SpeakingOfSuicide.com/resources for additional support.