Sarah Connor

Berlin CSD attacker Abdul Ballout had deep Islamic State ties and was under police surveillance, but struck on 25 July, killing one and injuring 31

Released from custody in May after a juvenile court conviction for planning to join the Islamic State, Abdul Ballout was under police observation and classified high-risk, but authorities had no hint of an imminent attack before he drove a van into CSD crowds on 25 July, then stabbed passersby with a machete, killing one and injuring 31.