McAfee antivirus software was ubiquitous in the 1990s, and its creator John McAfee helped define the modern cybersecurity industry. McAfee was an archetype of the Silicon Valley founder — bombastic, enigmatic and brilliant. But his life would take a dark turn. Reporter Jamie Tarabay investigated the early days of his career and found that the warning signs were there from the beginning. See omnystudio.com/listener for privacy information.