noun
first-degree murder
Legal term used in the context of US and some other foreign legal systems; not a category in Japanese criminal law.
アメリカでは第一級殺人は最も重い罪の一つだ。
In the United States, first-degree murder is one of the most serious crimes.
Compound of 第一級 (first class/degree) and 殺人 (murder/homicide), calque from English 'first-degree murder'.