“The seven suspects are guilty of beating the linesman’s head and upper body,” judge Anja van Holten said of the killing of Richard Nieuwenhuizen, 41, last December.

Nieuwenhuizen died following an attack by enraged youth players after officiating in a match near Amsterdam in which one of his sons was playing.

A total of seven young suspects, aged 15 to 17 at the time, and the 51-year-old adult were charged with manslaughter, public violence and brutality.