The police said they wanted to move the women to more secure prisons where they would not have control over the cellblocks.

In early 1966 Hayes was asked to nominate any prisoners he felt should be transferred to these new secure prisons.

In the years following, more than 70 prisoners escaped from this so-called secure prison.

Relatively, more black people were held in secure prisons.

After all, what could possibly go wrong on StateSec's most secure prison and private base?

FortWarren was a secure prison, the fort's high stone walls running right around the tiny island.

Despite being known as the most secure federal prison in the system, two inmates were able independently to kill their accompanying guards.

It was designed as the most secure prison within the Nevada Department of Corrections system.

Elashi was moved to a more secure prison in Illinois.

Erected between 1927 and 1935, it was built to be the most secure and modern prison in Europe.