Key jail areas in which gang members gather are the recreation yard and the law library.
"That's the recreation yard, and you'll be there for an hour," Gareth said.
The next morning the body of the sixth dead inmate was dumped into the recreation yard.
A recreation yard has basketball courts, a soccer field and a track.
He typically spends 23 hours a day alone in his cell and is allowed one hour of walking in a recreation yard.
And all of the inmates deemed "work capable" were also allowed several hours in the outdoor recreation yard each day.
No black inmates were permitted to testify, including those who had been in the recreation yard during the shooting.
They got 60 minutes in the recreation yard at night, without other detainees.
Eight are sent to one recreation yard and six to another.
Prisoners were allotted one hour every day in the recreation yard during the summer and 15 minutes during the winter.