First-degree murder is a class-A felony in the state of New York and subject to a variety of sentences, including imprisonment for 20 to 25 years, life in prison without parole or death. The death penalty has been ruled unconstitutional in the state of New York, however.
First-degree murder is one form of homicide under the law, and only an individual over the age of 18 can be charged with first-degree murder. Homicide is an act that causes another individual's death. The various types include first and second-degree murder, criminally negligent homicide and manslaughter.