Crime investigations are systematic processes used by law enforcement to solve crimes. They involve gathering evidence, interviewing witnesses, and analyzing information to identify suspects. Investigators often use various techniques, such as forensic science, to uncover details that can lead to solving a case. The goal of a crime investigation is to establish what happened during a crime, who was involved, and how to bring the responsible parties to justice. Tools like DNA analysis, fingerprint matching, and surveillance footage play crucial roles in helping investigators piece together the events surrounding a crime.