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Associated Press timeline of Kenneth Williams execution

April 29, 2017 11:46 p.m.

Witnesses say an Arkansas inmate who was the last in the state to be put to death before one of the state's lethal injection drugs expires lurched and convulsed on the gurney before he died Thursday night. A governor's spokesman described Kenneth Williams' movements as "an involuntary muscular reaction" that she said is a known effect of one of the execution drugs. Associated Press reporter Kelly Kissel witnessed Williams' execution along with two other media witnesses. A window separates the chamber from the witnesses. This is his account.