Right to life is the first condition of personal freedoms and the most important of non-disposable and inalienable fundamental rights. Voluntary manslaughter has been accepted as a crime under protection of right to life since the known history. Premeditated murder is accepted as an aggravated circumstance, but premeditation is not defined neither in the Law and nor in the Law’s preamble. Determination of the meaning of the premeditation remains to the doctrine and law practice. Premeditation is against passing of a reasonable time and having a chance to think calmly perseveringly performing the decision and perpetration of the murder crime by the perpetrator who decided to kill. According to Court of Cassation, performance of the decision in cold blood or planning the crime is not a criterion but just is a strong evidence about premeditation of crime. The Court of Cassation is actually according to the features of the incident showing an approach that emphasizes the killing decision taken in the perpetrator's inner world. The Court of Cassation has established a mixed criterion for existence of premeditation that has its own conditions.