"A video has also surfaced showing a masked man claiming allegiance to IS. It is possible that this is the 26-year-old Syrian who is said to have carried out the attack in Solingen. However, there is much to suggest that he was not directly controlled by IS. "My theory is that he radicalised himself and had little to no direct connection to IS beforehand. He only sent the video to the terrorist organisation shortly before the attack," says terrorism expert Hans-Jakob Schindler from the Counter Extremism Project in an interview with this editorial team."