Dumbest Criminals explores the surprisingly common theme of criminal incompetence within the true crime genre. Instead of focusing on criminal masterminds, the book highlights instances of human error, poor planning, and monumental errors in judgment that lead to the downfall of perpetrators. Through a collection of true crime anecdotes, the book examines why criminals fail, delving into the psychological factors at play and offering insights into human fallibility. One intriguing fact is how often criminals inadvertently assist in their own capture, like the robber who accidentally called the police during a heist. The book approaches the subject by dividing cases into categories such as poorly planned heists, significant errors in judgment, and the role of luck. Beginning with an introduction to criminal incompetence, it progresses through various case studies supported by police reports, court transcripts, and news articles. Dumbest Criminals stands out by focusing on failures rather than successes, offering a unique perspective on crime dynamics and demonstrating that even in high-stakes situations, human error is a pervasive factor.