. >> and -- >> they got me housed in administrative segregation for stabbing ab inmate. >> one of the jails most violent inmates gets a reality check from on officer. >>> like many urban jails, >>> like many urban jails, cincinnati's hamilton county justice center is located in the heart of downtown. the top floor of this five-story tower might be considered the penthouse suite in any other building. but here it is reserved for the jail's most dangerous inmates. >> this is the fifth floor. highest in the jail. maximum security is up here. >> nothing but the hard hitters. nothing but the hard hitters. killers. >> one unit on the the fifth floor houses inmates considered too dangerous for general population. it is known as administrative segregation, or ad seg. mark hinkston has been here seven months t. >> i'm one of the most hated people in whole institution. in fact they don't even allow me off of this pod. they got me housed in administrative segregation for stabbing an inmate around 7 months ago. >> he got into it with another inmate. and charged him and stabbed him in the back abo

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