Explore how investigators collect facts, organize evidence, and build cases.
Detectives and investigators follow leads after an incident is reported. Their job is to collect reliable information, document what happened, identify possible suspects or witnesses, and prepare evidence for prosecutors and courts while following legal rules.
Investigators organize reports, photographs, statements, records, and evidence into a case file.
Learn MoreDetectives talk with victims, witnesses, and other people who may have useful information.
Learn MorePhysical and digital evidence can support or challenge an explanation of what happened.
Learn MoreDetectives often work with specialists rather than doing every scientific test themselves.
Learn MoreInvestigations are limited by laws, constitutional rights, and court procedures.
Learn MoreMajor investigations often involve many people and agencies.
Learn MoreGood documentation helps investigators keep track of what is known, what still needs to be checked, and where information came from. Accurate reports are important because cases may be reviewed by supervisors, prosecutors, defense attorneys, and courts.
Interviews are used to gather memories and facts. Investigators compare statements with physical evidence, records, video, or other information. Laws and agency policies control how certain interviews are conducted.
Evidence may include photographs, documents, fingerprints, DNA, video, phone records obtained through legal processes, or objects collected at a scene. Investigators must document where evidence came from and how it was handled.
Crime laboratory personnel, digital forensic examiners, medical examiners, fingerprint specialists, and other experts may analyze evidence. Their findings can help investigators understand a case.
Searches, seizures, arrests, and requests for certain records may require legal authority such as consent, a warrant, a subpoena, or another rule defined by law. Courts review whether legal standards were followed.
Patrol officers, detectives, analysts, forensic specialists, prosecutors, victim advocates, dispatchers, and other agencies may all contribute. Coordinating information is an important part of complex cases.