video has now emerged which appears to show the mother-of-two leading members of the al-khanssaa brigade - the all-women contingent set up by isis - in a series of chants expressing the fighters ' commitment to jihad .
experts say the slicky-edited video is the first ` real evidence ' which shows jones is involved with the brigade at a ` high level ' that the three-minute footage also shows some of the fighters practising their shooting techniques , firing their guns in quick succession out of the camera 's view .