A Dutch court has convicted six young footballers and the father of one of the players of manslaughter in the death of a volunteer linesman who was knocked to the ground and repeatedly kicked after a youth match last December in a brutal attack that shocked this football-loving nation.

Judges in Lelystad sentenced the 50-year-old father to six years in prison. Five teenaged players were given two-year sentences in youth detention for their roles in the attack and another was sentenced to a year.

A seventh player, age 15, was sentenced to 30 days detention for assault.

The fatal attack took place on Dec. 2 in the Dutch city of Almere, after the home team Buitenboys drew 2-2 with Nieuw Sloten, which is based in a mostly immigrant neighborhood of Amsterdam.