How To Solve A Cold Case by Michael Arntfield

And Everything Else You Wanted to Know About Catching Killers

An accessible guide to the modern science and craft of reopening unsolved crimes, explaining how investigators prioritize leads, reconstruct timelines, and apply tools like DNA analysis, genetic genealogy, digital forensics, and geographic profiling. Drawing on real case studies, it demystifies what evidence still matters years later, how fresh interviews and public tips can shift a case, and why chain of custody and documentation are critical. It also offers practical advice for families and citizen sleuths on organizing information, collaborating responsibly with authorities, and avoiding common pitfalls, while highlighting the ethical and legal boundaries that govern cold case work.

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