The founder of a multimillion-dollar hedge fund was found dead from a gunshot wound to the head Sunday in his posh Manhattan apartment, police said.

The body of Thomas Gilbert Sr., the 70-year-old president of Wainscott Capital Partners, was found by his wife at about 3:30 p.m. in their bedroom, investigators said. His wife was not inside their Beekman Place apartment at the time of the shooting, police said.

Police recovered a gun, which they found near the body.

Gilbert's son, Thomas Gilbert Jr., has been taken into custody and is being questioned by police, authorities said. He was the only other person in the apartment at the time of the shooting, according to police.

No charges have been filed and police say they haven't ruled out calling the death a suicide.

Gilbert founded his hedge fund in 2011 and helped build it into thriving firm. The fund has $200 million in assets and focuses on the biotech and health care industries.

Business operations at Wainscott are "on hold," Clay LeConey, the fund's vice president for sales and marketing, said when reached at the company's office in the city. LeConey said the fund would not issue a further statement on the death of its founder.

A graduate of Princeton University and Harvard Business School, Gilbert had more than 40 years of investing experience.

Gilbert previously co-founded Syzygy Therapeutics, a biotech asset acquisition fund.

The shooting was a rare act of violence on Beekman Place, a tony enclave just north of the United Nations headquarters.