article_snippet: Cecil Clayton, from Purdy, is set to be put to death at the state prison in Bonne Terre at 6pm on Tuesday for the November 1996 shooting of Barry County Sheriff's Deputy Christopher Castetter.
article_snippet: Castetter, a 29-year-old married father-of-three, died in the hospital later that day.
article_snippet: Cecil Clayton was convicted of the murder in October 1997 and sentenced to death later that year.
article_snippet: Killed: Barry County Sheriff's Deputy Christopher Castetter, pictured left, was shot dead by Cecil Clayton, pictured right in an old mug shot, as Cecil Clayton responded to a call about a suspicious vehicle in 1996 .
article_snippet: Clayton, who is the state's oldest death row inmate, will be put to death between 6pm on March 17 and 5.59pm on March 18.
article_snippet: Clayton, who is the state's oldest death row inmate will become the second person put to death in the state in 2015, after a record 10 executions in Missouri in 2014.