Shawn Miller
© William MillerPolice investigate the scene Tuesday where Shawn D. Miller (inset) was found dead in a bathtub with his throat slit.
A Citigroup banker was found dead with his throat slashed in the bathtub of his swanky downtown apartment, authorities said Wednesday.

Shawn D. Miller, Citigroup's managing director of environmental and social risk management, was discovered around 3 p.m. Tuesday by a doorman in the Greenwich Street building, law enforcement sources said.

"We are deeply saddened by this news and our thoughts are with Shawn's family at this time," said a statement sent out by Citigroup.

There was no knife recovered at the scene, leading officials to suspect the death was not a suicide, and they were trying to determine who had access to his apartment.

One-bedroom apartments at the building are listed at more than $1 million.

An online profile under the man's name calls him a "pioneer in sustainable finance" and a specialist in emerging markets at the International Finance Corp., part of the World Bank. Several former colleagues told The Post that Miller was well-liked.

It was unclear why the doorman checked his apartment.