Amnesty Report on Horrors of "The Slaughterhouse" Syrian Prison

Known to detainees as "The Slaughterhouse," police hanged up to 13-thousand people in secrecy at the Saydnaya Military Prison before trucking their bodies to mass graves over the course of four years, according to a report from Amnesty International.

The report says the victims were mostly ordinary civilians who were thought to oppose the government. According to the report, victims were blindfolded during the process. They were told they had been sentenced to death minutes before they were executed and didn't know how they would die until the nooses were placed around their necks.