The phrase "a murderous turn" is correct and usable in written English.
It can be used to describe a situation or narrative that takes a violent or deadly direction.
Example: "The story took a murderous turn when the protagonist revealed their dark intentions."
Alternatives: "a deadly twist" or "a violent shift".
Postpartum depression takes a murderous turn in this slight exercise, which, for all its modesty, generates a measure of dread.
In the 1981 version of James M Cain's noir thriller, she plays Cora Smith, the beautiful, self-destructive wife of an older man, who has an extra-marital affair with Jack Nicholson's Frank Chambers before things take a murderous turn.
Cambara, with years of martial-arts training behind her and an inner rage that has taken a "murderous turn" after the drowning death of her son in the back-yard swimming pool of her husband's lover, seeks to wrest her family's property from a middle-ranking warlord.
It had nothing to do with McVeigh, a former soldier who had taken a murderous turn from anti-authoritarianism to racist paranoia.
(He also won a Golden Globe earlier this year for his murderous turn in Tom Ford's quixotic Nocturnal Animals).
Once you get past the awkward irony of such a sweetly melodic rock band naming themselves after Juliette Lewis's murderous turn in Natural Born Killers, Mallory Knox are a difficult bunch to dislike.
For explanations of the murderous turn the Soviet dictatorship took in the Stalin years, readers will have to look elsewhere.
Neither did his character in Undertow, a boy from the deep south, on the run from a murderous uncle who turns out to be his father.
Though it's plainly foolishness, male-to-male violence takes a more gratuitous turn when a murderous football coach (Mr. Ermey) harpoons a linesman with a yard marker.
Mr. Andres dismissed the suggestion that a murderous Cosa Nostra family would turn to a gentle soul as its boss after the death of the previous Bonanno chief in 1991.
As it happened, the event turned into a murderous spectacle when the Russian ambassador to Turkey, who was delivering a speech, was assassinated.
