This television series followed a veteran policeman turned private detective.
When the police fail to turn up any suspects, she turns private detective to track the killer down.
Someone launches a vendetta against the team and Katie turns detective to find out who.
"You've got enough to puzzle your brains over without trying to turn detective."
He has to turn detective in order to solve the case and thereby save his own skin.
A journalist turned detective, he is a rather weak and unpleasant man, generally disliked by all.
With hundreds, if not thousands, of other paintings continually on his mind in one context or another, he saw no reason to turn private detective.
Never in his life had Carpenter felt the urge to turn detective.
The police would be investigating murder this time, not a disappearance, and that was likely to make everyone they talked to turn amateur detective.
She turns detective, aided by her boyfriend (David Wallace) to find out the truth.