First, convinced that the explosion was an accident, the Navy failed to use its top investigators.

The district attorney, Charles J. Hynes, put his top investigators on the case.

Russia's top investigator said on 22 March that the emergency landing may have been caused by an infringement of safety rules.

'He's just about the top psychic investigator in this country,' Modesty said.

He became a top investigator for the agency and came to the New York office in 1947 as chief enforcement attorney.

"There's no reason to believe that threat is real," said one top investigator.

I can't waste one of my top investigators on this kind of case.

These officers should be senior leaders in police departments and top investigators who would be able to spot suspicious behavior in the communities they know.

But the next day, the Times quoted a "top investigator" as saying that there was "no reason to believe that the threat is real."

But the report questioned his use of top investigators to look into a rumor.