How can you investigate a cold case?

To investigate a cold case, start by reviewing all existing evidence, including witness statements, forensic reports, and case files to identify any overlooked details. Engage with law enforcement and forensic experts to re-examine physical evidence using modern technology, such as DNA analysis. Additionally, consider reaching out to the public for new information through social media or community outreach. Collaborating with investigative journalists or advocacy groups can also provide fresh perspectives and resources.