The son of a wealthy Manhattan hedge fund manager was arrested on a murder charge on Monday after shooting his father at his parents’ home, the police said.

The son, Thomas Gilbert Jr., 30, was arrested after his 70-year-old father, Thomas Gilbert, was found dead with a gunshot wound to his head on Sunday at his Beekman Place apartment, the police said. The son was also charged with criminal possession of a weapon.

The son visited his parents on the eighth floor around 3 p.m. and asked his mother to leave so that he could speak privately with his father, Robert K. Boyce, the chief of detectives for the New York Police Department, said at a news conference on Monday. The mother left to get food for her son, he said.

“About 15 minutes after that, she had a bad feeling and decided to return,” Chief Boyce said.

Around 3:30 p.m., she found her husband wounded on the floor with a gun resting on his chest and his left hand covering it, Chief Boyce said. The investigators believed that the crime scene appeared to be staged. Emergency medical workers pronounced him dead at the scene.