NEW HAVEN, Conn. -- Federal authorities asked Monday for the public's help in tracking down a man they say helped run one of the largest online child pornography websites ever investigated by law enforcement.

The suspect, whose real first name may be Shaun, may live in southern New England within a 100-mile radius of the New Haven, according to U.S. Immigration and Customs Enforcement's Homeland Security Investigations.

Authorities have some information about the man but have not been able to find him through traditional investigative methods and are asking the public for information on anyone who fits the profile.

The suspect is between 40 and 50 years old, likely works in construction management and travels regularly, authorities said.

He has degrees in electrical engineering and construction management and is proficient with computer programming. He may have previously worked in IT or information security.