Floyd was killed during an inmate uprising at the James T Vaughn Correctional Facility one year ago.
"It wasn't until Lt. Floyd's death that the rest of us truly understood what it meant to be a correctional officer, to really understand that you face danger every day all day long," Governor John Carney said.
A memorial plaque for Sgt. Floyd was unveiled during the ceremony. Floyd was posthumously promoted to lieutenant.
Carney also took time to thank all corrections officers for the dangerous work they do each and every day.
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