Criminal law encompasses the legal system and procedures that are used to hold accountable those who have violated societal norms and engaged in unlawful behavior. It is imperative to acknowledge that criminal law is distinct from civil law as the latter pertains to resolving conflicts among individuals or entities, instead of offenses perpetrated against society. The processes and regulations that manage the behavior of criminal investigations, court proceedings, and imposition of penalties are encompassed. The primary objective of the criminal justice system is to safeguard the community by discouraging illegal activities and penalizing wrongdoers. The field of criminal law encompasses various types of criminal acts, such as theft, assault, murder, drug trafficking, and fraud.

Many nations have authorized the government to create and implement criminal legislation, which may involve various divisions in charge of specific areas of the penal system. The criminal justice system is composed of various entities, which typically encompass law enforcement agencies, prosecutors, defense attorneys, judges, and correctional institutions.

The criminal law process typically begins with an investigation and ends with a final judgment or sentence. The following is a general overview of the criminal law process from beginning to end:

1. Investigation: The commencement of the criminal law process typically entails a thorough and systematic inquiry by law enforcement agencies. This may encompass various activities such as obtaining and scrutinizing evidence, conducting interviews with pertinent witnesses including complainants, and identifying potential perpetrators.

2. Arrest: Should law enforcement possess justifiable grounds to suspect an individual of having committed a crime, they are authorized to effectuate an apprehension and take the suspect into custody.

3. Charging: Following an individual's arrest, the prosecutor peruses the available evidence and subsequently determines the viability of pressing charges against the suspected offender. In the event that charges are brought forth, the individual in question is formally accused of committing a criminal offense.

4. Arraignment: The accused individual is presented before a judicial authority and apprised of the criminal accusations lodged against them. They are afforded the opportunity to enter a plea of either guilty or not guilty.

5. Trial: In the event that the case proceeds to trial, the prosecutor will furnish evidence along with presenting witness testimonies aimed at establishing the culpability of the accused beyond any reasonable doubt. The defense is entitled to produce evidentiary materials and solicited witnesses in order to challenge and discredit the arguments put forth by the prosecution in court.

6. Verdict: Upon reaching the culmination of the legal proceedings, the presiding judicial authority, namely the judge or magistrate, issues a verdict of culpability or exoneration.

7. Sentencing: In the event that the accused is convicted, the presiding judge may issue a verdict that encompasses a variety of punitive measures such as imprisonment, monetary penalties, supervised probation, mandatory community service, or other forms of retribution.

8. Appeals: Either the accused or the prosecutor retains the right to file an appeal with a superior court with regards to the verdict rendered or the sentence imposed.

9. Post-sentencing: Upon completion of their sentence, the defendant may be subjected to probation, parole, or various other forms of supervision. The type of supervision imposed typically depends upon the severity of the offense and the conditions set forth in the defendant's sentencing.