His physical strength appeared to be particularly lacking for a professional detective.

They were not professional detectives but simply an ordinary couple who stumbled across a murder or two every week for 12 years.

"I'm a professional detective just doing her job," she said.

Ray fails, because he's a professional detective and therefore much too logical.

But it also acquired professional detectives for the first time.

During this episode, Kramer mentions how he wants to become a professional private detective.

One would scarcely have taken them for professional detectives.

She'd never been face to face with a professional detective before.

"Because I'm a professional detective, and you're just a performer."

He'd better have the name I want, or I'm going to see about getting myself another professional detective for a partner.