The phrase "dangerous prisoner" refers to someone who has committed serious crimes and poses a significant threat to others or society. Full definition
The proposal would make it easier to challenge the release of dangerous prisoners. (newlawjournal.co.uk)
According to some media stories, hundreds of dangerous prisoners would have to be released, each with thousands of pounds in compensation. (newlawjournal.co.uk)
It is springtime on Alcatraz, and for the first time in years the flowers are blooming in a garden once tended by some of the most dangerous prisoners in the country. (parksconservancy.org)