Why did Jamaica become a British crown colony in 1866?

Jamaica became a British crown colony in 1866 primarily as a direct consequence of the Morant Bay rebellion in 1865.12

Following the collapse of the plantation system and widespread economic hardship, impoverished former slaves rioted in Morant Bay, killing the chief magistrate and several others. In response, the island's governor, Edward John Eyre, declared martial law and suppressed the uprising with extreme force, resulting in over 400 executions.12

Dismayed by the unrest and the state of the island, the Jamaican assembly voted to cede its power to the governor, effectively voting for its own extinction. Consequently, the British Parliament declared Jamaica a crown colony in 1866, placing executive and legislative authority in the hands of a newly appointed governor, Sir John Peter Grant, who subsequently initiated a comprehensive reorganization of the colony's administration and judicial system.132