NEW BRAUNFELS, Texas (KXAN) — What started as a family disturbance between a 17-year-old and his mother Sunday morning, ended with the teenager’s step-father picking up a shotgun and shooting and killing the teenager, according to New Braunfels police.

Police say Felix Antonio Nieves and his 43-year-old mother were fighting inside their home in the 2400 block of Dove Crossing in New Braunfels around 7 a.m. While fighting, Nieves’ mother took out a handheld stun gun, which she tried to use on her son. Police say the teenager was able to take the stun gun away from his mother and used it multiple times on her.

Officers said Nieves’ step-father, 46-year-old George Alexander Coryell, intervened by pulling out a .45 caliber handgun and attempted to fire it. When the handgun failed to go off, the step-father grabbed a 12-gauge double barrel shotgun and fired two rounds at Nieves, hitting him both times, killing him. Police noted in the press release Nieves was unarmed at the time of the shooting and had stopped assaulting his mother.

Coryell was arrested and faces murder charges. He is currently booked into the Guadalupe County Jail on a bond of $250,000.

Two other children living in the residence are now in the hands of Child Protective Services.