Criminal investigation in the context of "DNA evidence"

A judge is a person who presides over court proceedings, either alone or as a part of a judicial panel. In an adversarial system, the judge hears all the witnesses and any other evidence presented by the barristers or solicitors of the case, assesses the credibility and arguments of the parties, and then issues a ruling in the case based on their interpretation of the law and their own personal judgment. A judge is expected to conduct the trial impartially and, typically, in an open court.

The powers, functions, method of appointment, discipline, and training of judges vary widely across different jurisdictions. In some jurisdictions, the judge's powers may be shared with a jury. In inquisitorial systems of criminal investigation, a judge might also be an examining magistrate. The presiding judge ensures that all court proceedings are lawful and orderly.

Detective fiction is a subgenre of crime fiction and mystery fiction in which an investigator or a detective—whether professional, amateur or retired—investigates a crime, often murder. The detective genre began around the same time as speculative fiction and other genre fiction in the mid-nineteenth century and has remained extremely popular, particularly in novels. Some of the most famous heroes of detective fiction include C. Auguste Dupin, Sherlock Holmes, Kogoro Akechi, Miss Marple and Hercule Poirot. Juvenile stories featuring The Hardy Boys, Nancy Drew, and The Boxcar Children have also remained in print for several decades.

An examining magistrate is a judge in an inquisitorial system of law who carries out pre-trial investigations into allegations of crime and in some cases makes a recommendation for prosecution. Also known as an investigating magistrate, inquisitorial magistrate, or investigating judge, the exact role and standing of examining magistrates varies by jurisdiction. Common duties and powers of the examining magistrate include overseeing ongoing criminal investigations, issuing search warrants, authorizing wiretaps, making decisions on pretrial detention, interrogating the accused person, questioning witnesses, examining evidence, as well as compiling a dossier of evidence in preparation for trial.

Investigating judges in France have an important role in the French judiciary. They are also a feature of the Spanish, Dutch, Belgian and Greek criminal justice systems, although the extent of the examining magistrate's role has generally diminished over time. Since the late 20th and early 21st centuries, several countries, including Switzerland, Germany, Portugal, and Italy, have abolished the position of examining magistrate outright. In some cases, they have created new positions that take on some of these responsibilities.

Crime fiction, detective story, murder mystery, crime novel, mystery novel, and police novel are terms used to describe narratives or fiction that centre on criminal acts and especially on the investigation, either by an amateur or a professional detective, of a crime, often a murder. Most crime drama focuses on criminal investigation and does not feature the courtroom. Suspense and mystery are key elements that are nearly ubiquitous to the genre.

It is usually distinguished from mainstream fiction and other genres such as historical fiction and science fiction, but the boundaries are indistinct. Crime fiction has several subgenres, including detective fiction (such as the whodunit), courtroom drama, hard-boiled fiction, and legal thrillers.

Forensic science, often confused with criminalistics, is the application of science principles and methods to support decision-making related to rules or law, generally specifically criminal and civil law.

During criminal investigation in particular, it is governed by the legal standards of admissible evidence and criminal procedure. It is a broad field utilizing numerous practices such as the analysis of DNA, fingerprints, bloodstain patterns, firearms, ballistics, toxicology, microscopy, and fire debris analysis.

Kriminalpolizei (English: Criminal Police), often abbreviated as Kripo, is the German name for a criminal investigation department. This article deals with the agency during the Nazi era.

In Nazi Germany, the Kripo consisted of the Reich Criminal Police Department (RKPA), which in 1939 became Department V of the Reich Security Main Office (RSHA). There were criminal investigation centers directly subordinated to RKPA as well as criminal investigation divisions of the local state and municipal police departments. In 1943 both the latter became directly subordinated to the criminal investigation centers. The personnel consisted of detectives in the junior, executive, and female careers, as well as criminal investigation employees.

Transit police (also known as transport police, railway police, railroad police and several other terms) are specialized police agencies employed either by a common carrier, such as a transit district, railway, railroad, bus line, or another mass transit provider or municipality, county, district, or state.

Transit law enforcement services may also be provided by a specialized unit within a larger local law enforcement agency. Their mandate is generally to prevent and investigate all crime committed against the carrier or its passengers and crime incidentally committed on or around the carrier's property.

The Federal Court of Justice (German: Bundesgerichtshof [bʊndəsɡəˈʁɪçtsˌhoːf] , BGH [beːɡeːˈhaː] ) is the highest court of civil and criminal jurisdiction in Germany. Its primary responsibility is the final appellate review of decisions by lower courts for errors of law. While, legally, a decision by the Federal Court of Justice is only binding with respect to the individual case in which it enters, de facto the court's interpretation of the law is followed by lower courts with almost no exception. Decisions handed down by the Federal Court of Justice can only be vacated by the Federal Constitutional Court for violating a provision of the German constitution, the Basic Law.

In addition to the court's appellate duties, a few judges of the Federal Court of Justice act as investigating judges in criminal investigations led by the Public Prosecutor General for a small number of exceptional offenses (such as crimes against humanity and the formation of terrorist organisations). As such, they are responsible for issuing search and arrest warrants, among other things.