Boy, 16, admits murdering four students in US school shooting

Ethan Crumbley, 16, has admitted killing four students (Oakland County Sheriff’s Office via AP)

A teenager has pleaded guilty to terrorism and first-degree murder over a Michigan school shooting that put an extraordinary focus on the boy’s home life and the alleged role of his parents in the tragedy.

Ethan Crumbley pleaded guilty to all 24 charges, including the murder of four students, nearly a year after the attack at Oxford High School in south-eastern Michigan.