Was the Borussia Dortmund bus bombing motivated by greed?

It seems the rush to blame the Borussia Dortmund bus bombing on Islamist extremists was wrong. German police have now arrested a 28 year-old man in connection with the incident; and despite initial assumptions that this assault was the work of Islamic terrorists, it appears this latest suspect has no connection with Islamic State.

A week ago, it all seemed fairly straightforward: a letter had been found at the crime scene, claiming the attack had been carried out on behalf of Islamic State, and an Iraqi living in Germany had been detained by the police. The German prosecutor’s office said this man was a member of Isis, that he’d entered Germany last year, via Turkey, after leading an Isis commando unit in Iraq, and that he was still in touch with other members of Islamic state. So far, so predictable. Yet prosecutors warned they’d yet to establish a direct link between this man and the Dortmund bus bombing, and today’s arrest sends the investigation off on an entirely different course.