I think (emphasis on the think) that a dutch C130 pilot I met told me that the ATCO, Fire Chief and someone else from the Airport all served prison sentances for their involvement - but that's just hearsay!
In 2001 the controller and the fire chief were sentenced to 150 hours community service and 3 months suspended sentence.
On March 1 that year both were found not guilty on all charges by a Court Martial in Arnhem. The court concluded that better information, faster intervention or assistance from the regional firebrigade would not have led to fewer victims. The two, who had been put on non-active status shortly after the accident received official apologies and a financial settlement from the KLu in 2004
Edited to insert "not" in penultimate sentence