When the victim went to check on Nicholson, the pair began to argue.
Officers found Nicholson's 68-year-old mother, Lydia Nicholson, inside with a head wound.
Lydia Nicholson was taken to the healing facility where she passed on.
Nicholson then blamed her for the broken headset and threatened to kill the victim and Nicholson's father.
Investigators say the case remains open and urge anyone with information related to the shooting to call Ceres Police Detective Bryan Ferreira at 209-538-5616.
"It was the father calling to report that the son had shot his wife in the head", Ceres Police Sgt. Greg Yotsuya said, according to a report by KTXL.
He allegedly fired into a wall, twice.
Matthew Nicholson at that point faulted his mother and undermined to execute the two his folks previously he snatched a handgun in the home, police said.
A family companion told Fox40, "I comprehend that he would've murdered the father as well, however the weapon stuck. The father grabbed the gun, emptied it". His mother, Lydia Nicholson, game in and an argument ensued. Nicholson was later taken into custody at a relative's home in Riverbank.
He was booked on a homicide charge and is being held in the Stanislaus County Jail without bail.
"'I will forever love you, my best friend, my chosen one, my always, my forever my protector, my motivation, my blessing, and now my guardian angel", she wrote. News cameras joined them, and investigators came and went.