In 1706, senior governing officials were killed by a band of Koryaks and a period of general lawlessness abounded. The Cossacks began to take great liberties with the legal amount of tribute required and began the practice of taking Itelmen as slaves, often gambling with and trading them. During this time, rebellions were frequent. Atlasov resumed legal control, in an effort to reimpose law and order on the peninsula, after serving some time in jail. In 1711, his men mutinied and he was assassinated in his bed, after fleeing to Nizhnekamchatsk, where he was given asylum. The mutineers were excused from the death penalty provided they continue government work. Thus an expedition to the southern tip of the peninsula and onto the Kuril Islands was conducted, led by Danila Antsiferov and Ivan Kozyrevsky.