The police emergency centre alerted the nearest Incident Response Vehicle and the first officers arrived on the scene six minutes later. One officer stayed with a suddenly sober Martin while his partner confirmed that there was a body and that, everything else being equal, it probably wasn’t a case of accidental death. They found the head six metres away where it had rolled behind one of the neoclassical columns that fronted the church’s portico. The responding officers reported back to control, who alerted the area Murder Investigation Team whose duty officer, the most junior detective constable on the team, arrived half an hour later: he took one look at Mr Headless and woke his governor. With that, the whole pomp and majesty that is a Metropolitan Police murder investigation descended on the twenty-five metres of open cobbles between the church portico and the market building. The pathologist arrived to certify death, make a preliminary assessment of the cause and cart the body away for its post-mortem. (There was a short delay while they found a big enough evidence bag for the head.) The forensic teams turned up mob-handed and, to prove that they were the important ones, demanded that the secure perimeter be extended to include the whole west end of the Piazza. To do this they needed more uniforms at the scene, so the DCI who was Senior Investigating Officer called up Charing Cross nick and asked if they had any to spare. The shift commander, upon hearing the magic word ‘overtime’, marched into the section house and volunteered everyone out of their nice warm beds. Thus the secure perimeter was expanded, searches were made, junior detectives sent off on mysterious errands and finally, at just after five o’clock, it all ground to a halt. The body was gone, the detectives had left and the forensic people unanimously agreed there was nothing more that could be done until dawn — which was three hours away. Until then, they just needed a couple of mugs to guard the crime scene until shift change.