The alarms were sounded overnight, and by early morning the meetings were arranged at timed intervals in the Secretary of State’s seventh floor office at Foggy Bottom.

The FBI was obviously first. Henry Hartz cupped the Bureau Director’s elbow to guide him away from office formality to the dining annexe, where breakfast was laid.

‘So what the hell have we got here?’ demanded Hartz. ‘A Russian diplomat, killed Mafia-style!’

‘I wish to God I knew.’ Leonard Ross was a carelessly fat, carelessly dressed man who had been a senior judge on the New York bench before accepting the appointment as FBI Director. After two years of Washington politics he regretted it, and promised himself he’d quit one day soon. Hartz was one of the professionals he got on with better than most.

‘The Bureau will naturally handle everything,’ declared Hartz.

Ross refused the covered food dishes, but poured himself coffee. ‘You know Russia’s got its own Mafia?’

‘That’s where I want it to stay. I don’t even want to think what the media are going to make of this.’ Hartz crumbled a Danish, mostly missing his plate and making a mess.

‘Have the Russians said anything?’

‘The ambassador is due at noon. What do we know about Serov?’

Ross made a doubtful face. ‘Senior cultural attache. Married. No children: not with him in this country, anyway. We never marked him as anything but a genuine diplomat…’ He sipped his coffee. ‘Only intriguing thing is his length of service. Seven years here. There have been two visa extensions…’ Ross smiled. ‘Both of which your people approved, without reference to us.’

‘How big a task force will you put on it?’ The early sunlight reflected oddly off Hartz’s spectacles, making him look sightless.