Kenyan police are a law unto themselves and often execute criminal suspects and other individuals with impunity, a UN expert said Wednesday. Such executions are not the work of rogue officers but are widespread and carefully planned, UN Special Rapporteur Philip Alston told journalists at the end of his 10-day mission in Kenya. Alston said before he came to Kenya he knew that police carried out executions but he did not realize the true extent of the problem. "(I found) the existence of a systematic, widespread and clearly planned strategy to execute individuals carried out on a regular basis by the Kenya police," said Alston. He said officers who carried out the executions had the support of and were possibly directed by the highest levels in the force.