"You're a professional investigator, and you said you've done volunteer work at a wolf sanctuary."

This is an excellent handbook by a very professional private investigator.

An early recorded professional criminal investigator was the English constable.

More important, the professional investigators have not found that the company or its employees behaved in an illegal manner.

The people I spoke to praised you as a very intelligent, professional, and dedicated investigator.

It doesn't take a team of professional investigators to discover that there are stupid people in the world.

No professional investigators, comparable to the twentieth century 'private eye', existed at this time.

Isn't that the way a real professional investigator would go about worming information out of people?

"Mr. Colfax is a very real professional investigator," she said.

"You could always hire a trained professional investigator to find it for you."