Video shows brutality of knife attack on helpless inmates

COLUMBUS, Ohio — A newly released video shows the brutality of an Ohio inmate's knife attack on four other prisoners who were handcuffed to a table and unable to defend themselves.The video obtained by The Associated Press reveals for the first time the extent of the victims' injuries and raises questions about how the bloody attack happened inside the Southern Ohio Correctional Facility in Lucasville, one of Ohio's most secure prisons. Additional security concerns were raised months later