Surprisingly, now that I was here, in the centre of the killing ground, I felt completely calm. Surrounded by this cave of transient treasures, guided by this nervous public relations man, death lost its power to threaten, measured in nothing more fearful than bust sizes and kilobyte capacities. The human race sleepwalked to oblivion, thinking only about the corporate logos on its shroud.

‘Mr Pearson? I’m sorry, I wasn’t thinking . . .’

‘It’s all right, Tom. No need to worry.’ Trying to calm the young manager, I placed a hand on his shoulder. ‘The hatchway on the third floor. I take it the shots came from there?’

‘That’s correct.’ Carradine steadied himself with a visible effort of will. He stiffened his neck and breathed deeply to a count of six. Nothing in his training had prepared him for this reconstruction. He spoke rapidly, as if reading from a press handout. ‘Two bursts of fire, at 2.17 p.m., before anyone realized what had happened. Witnesses say everyone stopped and listened to the echoes, thinking they were more shots.’

‘And then?’

‘Then? Total panic. All the down escalators were full, people on the upper floors were fighting to get into the lifts. It took us three days to identify all the shopping bags left behind. You can imagine the scene, Mr Pearson.’

‘Sadly, I can.’

‘Two people died instantly—Mrs Holden, a local pensioner, and a Mr Mickiewicz, a Polish visitor. Your father and fifteen others were wounded.’ Carradine clenched his fists, ignoring the shoppers who paused to listen to him, under the impression that he was leading a conducted tour. ‘It was so crowded, Mr Pearson. You have to understand the gunman couldn’t miss.’

‘That must have been his idea. The lunchtime surge.’ I gazed around the concourse, and imagined a gunman opening fire at random. ‘It’s surprising more people weren’t hit.’

‘Well . . .’ Carradine nodded ruefully as a middle-aged woman with two heavy shopping bags strained forward to whisper to him. ‘The bears were hit.’

‘The bears?’

‘The Three Bears . . . the Metro-Centre mascots. People were very affected . . .’

Carradine pointed to the centre of the concourse. On a circular plinth stood three giant teddy bears. The father bear was at least fifteen feet tall, his plump torso and limbs covered with a lustrous brown fur. Mother and baby bear stood beside him, paws raised to the shoppers, as if ready to make a consumer affairs announcement about the porridge supply.

‘Impressive,’ I said. ‘Completely bear-like. They look as if they can speak.’

‘They can’t speak, but they can move. They dance to the music. “Rudolph the Red-nosed Reindeer” was their favourite.’ Soberly, Carradine added: ‘We switched off the motors. Out of consideration . . .’

‘Sensitive of you. And the bears were hit? I’m glad they weren’t seriously injured.’

‘It was a close thing.’ Carradine pointed to the rounded abdomen of the mother bear, and to the left ear of the father bear. Darker squares of fur had been stitched over the original fabric, giving both creatures a rather rumpled look, as if they had been scuffling over the breakfast table. ‘Our customers were very upset. They sent in hundreds of letters, get-well cards . . .’

Without thinking, we had walked over to the bears. I noticed the cards decorating the plinth, many carrying messages in adult handwriting. There were flowers, a row of miniature teddy bears, one wearing a tiny St George’s shirt, and a dozen jars of honey and treacle.

Listening to myself, I said: ‘It’s almost a shrine.’

‘Definitely.’

‘Let’s move on.’ I beckoned Carradine away from the stuffed trio, though I was aware that my sympathy for the bears had brought us closer together. ‘It’s a pity about the bears, but they seem to be well cared for. Now, which of these escalators did my father take?’

‘He didn’t take an escalator, Mr Pearson.’

‘Sergeant Falconer said he was going up to the third floor. He bought his tobacco from a shop . . .’

‘Dunhill’s. But not that morning. He took the staircase to the exhibition area.’

A mezzanine deck jutted over the concourse between the ground and first floors, reached by a staircase with white rails. There was an observation platform where shoppers could rest and look down on the crowds below. A section of the mezzanine was a public gallery, hung with dioramas of new housing estates and science parks.

‘We donate the space to local businesses,’ Carradine explained. ‘It’s part of our public education programme.’

‘Enlightened of you.’ I waited for Carradine to inhale deeply. ‘Now, where was my father shot?’

Without speaking, Carradine pointed to the observation platform. He had begun to sweat copiously, and buttoned his jacket, trying to hide the damp stain under his tie. He watched me stiffly when I climbed the dozen steps to the platform, then turned and fixed his gaze on the giant bears.

I stood on the platform, almost expecting to see my father’s blood staining the metal floor. He had spent his last moments resting against the rail, tired by his walk to the Metro-Centre. The fire-control hatch was little more than twenty feet away, and I tried to imagine a bullet passing through my head. Following its possible track, I noticed a shallow groove in the railing. The staircase had been repainted, but I placed my index finger in the groove, taking the last pulse of my father’s life, a final contact with a man I never knew.

‘MR PEARSON—everything all right?’ Carradine was relieved that the tour was over, an ordeal he had clearly never anticipated. ‘If we go to my office . . .’

‘I’m fine. You’ve earned yourself a stiff drink. First, though, I need to take a look at the fire-control point.’

‘Mr Pearson? That’s not a good idea. You might find it . . .’

I held his elbow and turned him to face the bears. A technician was working on the instrument panel inside the plinth, and the mother bear gave a skittish twitch, as if ducking another bullet. I said: ‘I need to see the whole picture. My father died in your store, Tom. You owe it to me and the bears.’

WE STOOD INthe narrow chamber behind the fire hose, the high-pressure pump and gas cylinders next to us. The hose would project a stream of foam at the pedestrian decks and smother any burning debris that fell from the roof. Leaning through the open hatch, I could see the observation platform, the mezzanine deck and the entire concourse.

‘Good. Tell me, Tom, how did Christie get in here?’

Carradine straightened his tortured body. The sweat from his hands left damp prints on the metal wall. ‘The fire crews have key cards. Christie must have stolen one from their locker room.’

‘It’s a miracle he made it here.’ We had emerged from a maze of service corridors, tunnels and freight elevators. ‘It’s not easy to find. Did Christie have a friend on the inside?’

‘Unthinkable, Mr Pearson.’ Carradine stared at me, shocked by the thought. ‘Christie is very devious. He was always hanging around.’

‘All the same, no one actually saw him fire the weapon. How did he smuggle it in here?’

‘Sergeant Falconer told me he hid it behind the gas cylinders.’

‘Sergeant Falconer? For someone so uptight she gets around . . .’

‘Two women leaving the staff toilet saw Christie run to the emergency exit. Several people recognized him in the car park.’

‘They all knew him?’

‘He’s a local troublemaker, a very nasty type.’

‘That’s the problem.’ I moved the foam gun in its gimbals, training the brass barrel on the bears. ‘All that screaming and panic—anyone running away would look like an assassin. Especially the local misfit.’

‘He’s guilty, Mr Pearson.’ Carradine nodded vigorously, his confidence returning. ‘They’ll convict him.’

I GAZED DOWNat the mezzanine, wondering what had drawn my father to a property developer’s pitch. Beyond the exhibition space, separated by chromium rails and a security gate, was a small television studio. There was a hospitality area of black leather sofas, and a circle of cameras and lighting arrays grouped around a commentator’s desk and the guest banquettes.