New York police hunt brazen Manhattan gunman

New York: New York police released a new security camera picture Thursday of the man believed to have shot a top health insurance executive at close r...

New York: New York police released a new security camera picture Thursday of the man believed to have shot a top health insurance executive at close range in a brazen daylight murder outside a Manhattan hotel.

The latest picture, in which the suspect's face is uncovered and he is smiling or laughing, indicated progress in the manhunt after Wednesday's shock killing.

In a hit conducted in front of bystanders and seen by millions on TV replays of security camera footage, the masked killer used a pistol to gun down Brian Thompson, CEO of UnitedHealthcare -- one of the country's largest medical insurers.

Thompson was attending an investor conference in the Midtown business district.