Hughes is alleged to have been involved in the killing with a named individual and others. He is said to have met Kok at a Citizen M hotel in Amsterdam. Information about Kok's whereabouts was allegedly passed to others before an initial attempt to kill the Dutchman was made. Prosecutors claim Hughes then went with Kok the same night to the Boccaccio Club in Laren. It is there Kok was repeatedly shot on the head and body. Donald Findlay, defending, pleaded not guilty on behalf of Hughes during a short hearing at the High Court in Glasgow. The QC said investigations into the case were on-going. No trial was set.