Who said "Murder most foul requires a most careful hand."?

This quote is attributed to Justice Wargrave.

Murder most foul requires a most careful hand. - Justice Wargrave

"Murder most foul requires a most careful hand."

Justice Wargrave Justice

Character in And Then There Were None

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"Murder is justified when the victim deserves it."

"The guilty cannot hide forever."

"Justice must be served."

"Every man and woman is alone."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."