Three boys, who beat a homeless man to death on a dare, will spend years in detention in northwest England.
Brothers Connor Doran and Brandon Doran - 17 and 14 years old respectively - and their friend Simon Evans, 14, attacked Kevin Bennett as he slept outside a Liverpool supermarket on 17 August 2012.
Bennett, 53, died from his injuries six days later.
The three boys were convicted in February.
In his sentencing on Monday, Judge Clement Goldstone said it was a "desperately sad reflection on this society" that the boys engaged in "serious violence purely for the sake of it”.
Connor Doran was sentenced to a minimum 12 years and his brother received six years for acting as a lookout.
Evans was ordered to serve at least eight years.
