Prosecutors want to lock a 12 year old boy up for the rest of his life - to stop him from killing again.Cristian Fernandez could become America's youngest ever 'lifer' after being charged as an adult over the murder of his two-year-old brother.Prosecutor Angela Corey said: 'We have to protect the public from this young man'. She recommended that he face trial as an adult.Ms Corey said the public had a 'right to be protected' from him. If Fernandez were charged as a juvenile and convicted he would be free by the time he is 21.Fernandez is alleged to have beaten his younger brother David Galarriago to death at their home in Jacksonville, Florida, in March.The two year old died from a fractured skull that caused bleeding on the brain.He died two days after being admitted to a hospital.An autopsy showed the injuries were caused with blunt force trauma consistent with being punched in the head.Source: Daily mail