Mark John

Mark John is a former award-winning detective from the north of the UK with extensive experience leading serious, complex investigations, including historic abuse cases and major homicides.

In "The Ashamed," he channels his first-hand expertise into the character of Charlie Oscar, offering readers an unprecedented, authentic look into the true investigative mindset.

Drawing from a decorated career, he captures the evidential frustrations, the emotional toll of the badge, and the chilling psychology of the suspects involved, delivering a procedural thriller anchored in absolute, gritty reality.