A few prisoners are held under close or maximum security.

Of course to give maximum security this code number needs to be changed frequently.

For maximum security, try to do everything in your head.

There was maximum security, of course, so no one could get really close without a good reason.

I'm just not set up over here for maximum security.

"You have more flexibility in maximum security moving inmates around inside."

This meant it could use less staff but still have maximum security.

We are now going to maximum security immediately throughout this entire facility.

In maximum security, Peter was allowed only one real visitor a week, but certain people didn't count.

They were detained under maximum security for two weeks in prison.