The difference between First-degree murder and Murder one
When used as nouns, first-degree murder means murder which is premeditated with malice aforethought, whereas murder one means murder in the first degree.
check bellow for the other definitions of First-degree murder and Murder one
-
First-degree murder as a noun (chiefly, US):
Murder which is premeditated with malice aforethought.
-
Murder one as a noun (US, colloquial):
murder in the first degree.