A 16-year-old girl discovered a decapitated man inside a Staten Island home Monday afternoon, New York police sources said.

The grisly discovery was made around 4:30 p.m. on Cary Avenue in West Brighton.

The 45-year-old victim was found in a bathtub with multiple stab wounds to his head and neck, and his head had been removed with a hacksaw, police sources told PIX11 News.

Investigators later took the victim’s 19-year-old stepson into custody. A motive was not released. It’s unknown what charges he faces at this time.

According to the property manager, the victim was retired from the city’s Department of Sanitation.

The manager also said they believe the suspect is schizophrenic.