Perpetrator of Syria’s Tadamon massacre still working on military base

Maj Amjad Yousef, identified on videos as killer of dozens of people, accused of directing more mass killings

The Syrian intelligence officer at the centre of one of the most shocking acts of the civil war - the Tadamon massacre - is still working on a military base outside Damascus and has since been accused by colleagues of directing up to a dozen more mass killings.

Amjad Yousef, a major in one of Syria's most feared intelligence units, is operating from the Kafr Sousa base, where he has been for most of the past six months since the Guardian revealed his role in shooting dead dozens of people across a death pit in Tadamon, a suburb of the Syrian capital in 2013.