A crime which almost half the
people who commit it get away with it. Killing another human being.
Not all forms of killings are considered murder. Accidental killings are usually not, although they may constitute a lesser offense such as manslaughter if done extremely carelessly. Self Defense killings also usually not considered a crime, but may constitute voluntary manslaughter if done with excessive
force or under a mistaken belief that
one's life is in danger. (Varies by circumstance extremely). In some countries, the death penalty is carried out and is not considered murder, while in most, it IS considered murder and is therefore abolished. In some states, lethal
force is authorized if
one's property is in danger. For example, if I
see someone stealing a TV from my driveway, my life is not in danger, but my belonging is, so in some states, that alone is justification to use lethal
force.
In some places, murder is punishable by death. This is usually only reserved for first degree, premeditated and planned out murder. Most often though, First Degree murder is punished by life imprisonment with parole eligibility after a certain
number of years. Sometimes there is no parole eligibility. Second Degree Murder is usually punished by a fixed term imprisonment, usually around
20-40 years in
prison, but in some jurisdictions, it's punishable by life with parole.
Even when a prisoner is eligible for parole, it's rarely granted for murder. In fact, parole eligibility serves a purpose mainly for mental health. A prisoner who 100% certainly will spend their life in
jail deteriorates rapidly, while a prisoner with SOME prospect for release has an incentive to behave well and
stay healthy.