The perpetrators are often members of or collude with organized criminal groups. It allows firms to collude by simply agreeing on a base price. Furthermore, privacy requirements may be violated if the privacy CA and verifier collude. You can collude all you want with a foreign government in an election. The three principals begin to collude with one another to varying degrees. Morn and Nick collude to frame Angus for stealing station supplies. Rimet and Buero collude to award the first World Cup to Uruguay. A review in the "Journal of Clinical Oncology" denied that physicians collude against unconventional treatments.