监察机构发现，在七名男子（包括两名警察）被一辆在高速公路上逆行驾驶的车辆撞死之前，警方并未使用“刺钉带”和“战术接触”。
A 'stinger' and 'tactical contact' were not used by police moments before seven men were killed, including two officers, by a vehicle driven the wrong way down a motorway, a watchdog found.