The Gilbert Police Department in Arizona responded to a call reporting a vehicle had backed into a residence early Christmas evening. 

Upon arrival, officers found an elderly man suffering from gunshot wounds.

"Responding officers located an 80-year-old male victim with gunshot wounds inside the vehicle," the police department said in its report. "Life-saving measures were attempted but unsuccessful, and the victim was pronounced deceased at the scene. There were no other reported injuries."

Police spoke with individuals at the scene of the Christmas murder, one of whom was allegedly a male relative of the victim.

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Michael Kaser photo with crime scene

Michael Kaser, 48, is accused of shooting and killing his 80-year-old stepfather in Gilbert, Arizona. (Credit: Fox 10 Phoenix)

Based on witness testimony, officers arrested Michael Kaser, 48, and took him into custody. 

"Through the subsequent investigation and witness statements, it was alleged that Kaser had shot his stepfather upon returning from a family dinner," the Gilbert Police Department stated. "Kaser was arrested and booked at the Maricopa County Sheriff’s Office ITR Facility for one count of first-degree murder."

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The investigation remains ongoing, according to authorities.

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Kaser is being held on a $1 million bond.