Watch: Syria former prison guard tells BBC he showed detainees 'no mercy'

Former officials reveal their involvement in enforcing the brutality of Assad's regime, including torture, in a BBC investigation into Syria's notorious prisons under his rule. The UN stated that detentions and torture in Syria constitute crimes against humanity, with an estimated 100,000 people disappearing during Assad's 24-year rule. The BBC's documentary, "Surviving Syria's Prisons," features first-hand testimonies from officials who spoke out, shedding light on the atrocities committed under Assad's regime. The identities of the officials have been concealed by the BBC to protect their testimonies.