A police investigation is the process by which investigators study crime scenes and gather information from witnesses, victims, suspects, and other people involved. This information is then used to determine whether there is enough evidence for a criminal case to go ahead.
During the investigation stage, police examine the crime scene, speak to the victim and witness, and analyse any physical evidence. Based on this, they decide whether there is sufficient proof for the criminal to be charged with a crime and submit this to Crown counsel.
The investigation process can be complicated by a number of factors, including unwilling witnesses and conflicting evidence. To overcome these challenges, detectives collaborate with prosecutors to ensure that all case elements meet the required standard of proof. The partnership also aids in the preparation for preliminary hearings, grand jury sessions and trials.
As part of their investigations, detectives must carefully protect evidence at the scene of the crime. This includes establishing boundaries to restrict access to only authorised individuals and using physical objects like patrol cars or tape to mark off areas. The protection of a crime scene is an important aspect of any investigation, since contamination can ruin evidence and prevent the prosecution of a criminal.
A police investigation can be a complex process, but the right skills and training can help officers solve crimes faster. For example, a criminal justice degree program like the one offered by American Military University can equip students with the relevant skills to conduct successful investigations. Courses cover a wide range of topics, including criminal investigation, ethics in law enforcement, and the U.S. legal system.