· the girl died of several stab wounds—an indication that the attack was carried out in anger and with homicidal intent. · as we previously reported, adolescence isn’t a whodunit but a whydunit. Unpacking whether jamie killed katie (and how the series is a warning to parents) netflixs powerful series about online radicalization and violence ends on a. · at the end of episode 1, detective inspector bascombe and detective sergeant misha frank pulled cctv footage showing jamie stabbing katie seven times in a parking lot, ultimately confirming that he indeed killed her. · adolescence revolves around a 13-year-old boy, jamie miller (owen cooper), who is accused of murdering a girl at his school. · in just four episodes, the limited series tells the story of jamie miller, a 13-year-old boy accused of murdering a female student named katie leonard, and the impact the crime has on his. The answer of why jamie murdered his classmate katie in the netflix series is far more complex, according to a licensed. · adolescence ending explained: Ultimately, in the grand scheme of jamie’s life, his actions were built brick-by-brick by the toxic and vile misogyny that radicalized him. · jamie killed katie because of a combination of factors, including his “lack of self-esteem, perceived bullying at school, and access to online incel propaganda,” according to tudum.