Noun
(law, chiefly US, Canada) The criminal offence of murder in a form considered by law to be the most serious; the precise distinction may vary by jurisdiction but typically involves premeditation, or the choice of victim or other circumstances being regarded as especially blameworthy.
(law, chiefly US, Canada) An act that constitutes the crime of first-degree murder.
Source: en.wiktionary.orgMy understanding of first-degree murder is that premeditation needs to be proven. Henry Rollins
If you commit perjury in a so-called first-degree murder case, and you're caught red-handed for the entire world to see, and you get only a $200 fine, what kind of message does that send about lying in our courts? Johnnie Cochran