A Digital Media Investigator (DMI) is a specialist, often in law enforcement, who gathers, analyzes, and uses digital evidence from online sources (social media, apps, web) to support criminal cases, build intelligence, and help solve crimes like harassment, fraud, and threats by tracing digital footprints and communications. They work with investigators to develop digital strategies, analyze communications data, investigate social media accounts, and provide expert analysis, even testifying in court.