A man's body floated to the water's surface off of Sheepshead Bay in southern Brooklyn on Monday morning, with his face and hands wrapped in duct tape, his body wrapped in plastic bags, and his feet encased in concrete.

Police said that a student at Kingsborough Community College in Manhattan Beach spotted the body in the water at around 10:30 a.m. on Monday while walking along the bay shore on the school's campus.

"This individual was wrapped in black plastic bags and his arms were tied behind him," NYPD Chief of Detectives Robert Boyce told reporters. "His feet were submerged in poured concrete, obviously a homicide."

The man had tattoos on his back, including a large image of the Virgin Mary holding a rose. He was wearing gray sweatpants, blue boxers, and a black jacket.

The Medical Examiner's Office is trying to determine the man's cause of death, and how long his body was in the water.

As the New York Times notes, bodies in New York's waterways tend to rise to the surface in the spring, when hotter temperatures ramp up decomposition, a process that "produces gases that make a body buoyant enough to float to the surface."