The killer in the Netflix series "Adolescence" is Jamie Miller. He fatally stabbed his classmate Katie seven times, as shown in the CCTV footage revealed in the first episode. Jamie initially pleads not guilty but changes his plea to guilty in the finale, confirming his responsibility for the murder. The series explores Jamie's troubled psyche, insecurities, exposure to online misogynistic ideologies, and the impact of his environment, rather than portraying him as a typical malicious character. His actions and guilt are undeniable in the narrative, and the story deeply delves into the emotions and consequences for Jamie and his family.
