More than two years after Michigan’s deadliest school shooting, a judge imposed a historic sentence – and the harshest possible penalty – for the teenage gunman.

According to CNN, Crumbley told Oakland County Sheriff Michael J. Bouchard that he's prepared to spend the rest of his life in prison for the school shooting, during which he used a firearm obtained from an unlocked container in his home, and is said to be remorseful for the harm he caused, according to defense attorney Paulette Loftin.