Branson, dressed today in an expensive-looking collarless leather jacket over a black T-shirt, was scribbling a number down on his pad. ‘Ten minutes,’ he said. ‘I’ll call you back. No, don’t worry. Absolutely. Thank you.’

Everyone had suddenly fallen silent, watching him. As Branson hung up the receiver he said, ‘Another possible lead.’

‘Any good?’ Grace asked.

‘A man was calling me from a payphone – he was scared to talk from his home. Then he started worrying about a car parked down the street. He wanted to walk past it, check it out. I have to call him back in exactly ten minutes.’ Branson checked his watch, a massive, stainless-steel rectangle that he liked to show off ad nauseam. It was a Russian divers’ watch, he told everyone, which he had bought from some trendy shop in Brighton. It was meant to be the largest wristwatch in the world. Grace had seen grandfather clocks that had smaller faces.

They had logged over two hundred and fifty calls from the public since the story of the murder first broke on Wednesday afternoon. All of them had to be followed up, and all but a tiny percentage would amount to nothing. Now with the information about the scarab beetle in today’s Argus – and it would no doubt be in all the nationals tomorrow – the call rate would probably go up, and they would have a much harder time sorting the genuine from the cranks.

‘Time waster or real?’ Grace asked.

‘He says he thinks he witnessed Janie Stretton’s murder.’

36

Grace drove while Emma-Jane Boutwood, smartly dressed in a navy two-piece with a pale blue blouse, sat in the passenger seat of the unmarked Mondeo, with the directions she had printed off the internet on her lap on top of a large brown envelope.

Normally Roy Grace would have used an hour-long car journey as an opportunity to bond with a junior member of his team, but he had too much on his mind this morning, of which his anger at Norman Potting was just a small part, and their conversation was sporadic. E-J told him a little about herself – that her father had an advertising agency in Eastbourne and that her kid brother had survived a brain tumour some years back. Enough for Grace to get some sense of the human being behind the front of the young ambitious policewoman that he saw in the office. But she got very little back from him, and after a few attempts at engaging him in conversation she took the hint that he wanted silence.

He kept the car to a steady 75 mph, travelling anti-clockwise along the M25. It was one of his least favourite roads, its frequent heavy congestion causing many people to nickname it the world’s biggest parking lot, but this Saturday morning the traffic was light and moving steadily. After a fine early start the weather was now deteriorating, the sky turning an increasingly ominous charcoal colour. A few spots of rain were striking the windscreen, but not enough yet to put the wipers on. He barely even noticed them; he was driving on autopilot, his conscious brain focusing on the case.

Janie Stretton had been murdered some time on Tuesday night and it was now Saturday morning, he was thinking. They still did not have her head, nor any motive, nor any suspect.

Not one damned clue.

And Alison Vosper had told him that on Monday the supremely arrogant Detective Inspector Cassian Pewe from the Met was joining Brighton CID at the same rank as himself. He had no doubt that the Assistant Chief Constable was waiting for him to put just one more foot wrong, and he would be off this case in a flash, replaced by Pewe, with his shiny blond hair, angelic blue eyes and voice as invasive as a dentist’s drill.

Alison Vosper would be keen for her new protégé – which was how Pewe seemed to Grace – to make his mark quickly, and there could be no better showcase than a high-profile murder like this, where the existing team was getting nowhere.

What puzzled Grace most was the savage nature of the killing – the assailant must have been in a total frenzy – yet the absence of any apparent sexual assault. Did they have someone totally deranged, perhaps another schizophrenic like Peter Sutcliffe, the Yorkshire Ripper, on their hands? A man who heard voices from God telling him to kill hookers?

Or had Janie Stretton made an enemy?

Obviously her last boyfriend Justin Remington was a potential suspect, but from what Janie’s father had said, he was a long shot. Bella Moy was a good judge of people – Grace would have a better feel about this man after she had interviewed him, which would be today, with luck, if she could get hold of him. If she felt any inkling of something not being right, he would then go and see the former boyfriend himself. But if, as he strongly suspected, it wasn’t Justin Remington, then who? Why? Where was the killer now? Out there somewhere, about to strike again?

Last night, after he had been to see Brent Mackenzie, he had grabbed some fish and chips – and a pickled onion – and taken them back to the then almost deserted MIR One. He had washed the meal down with a tannic cup of vending-machine tea while poring over the case notes to date that Hannah Loxley, the team’s typist, had prepared for him.

He had sat there a long time, staring at the photograph of Janie Stretton’s face, then at the two large whiteboards. On one was pinned a section of an Ordnance Survey map of Peacehaven, with the two locations where her hand and the rest of her headless torso had been found ringed in red. There were also photographs of the body in situ, and a couple taken during the post-mortem, one showing the beetle in her rectum. He could picture, vividly, every detail of them now, and shuddered suddenly in revulsion.

What happened to you, Janie, on Tuesday night? And who was Anton? Did Anton do this to you?

His thoughts turned to Derek Stretton. Over 95 per cent of all murder victims in the UK were killed either by a member of their own family or by someone they knew. Was there anything he and Glenn Branson had missed when they had gone to see Janie’s father yesterday? Something the man said that suggested he might have butchered his own daughter? Anything was possible; Grace had learned that much during his years in the force. But Stretton had seemed genuine, a sad father, down and lost. He did not have the aura of a man who had just killed someone.

The car radio crackled into life. They were out of range of Sussex Police airwaves now and were picking up a Bromley area controller, calling for a car to attend an RTA. Emma-Jane turned the sound down. ‘Almost there,’ she said. ‘Go straight over the next roundabout, then it should be the second street on the left.’

Suddenly, as if the sky had been saving it all up, a torrent of rain exploded onto the windscreen, danced on the bonnet of the Ford, rattling like pebbles on the roof. Grace fumbled to find the wipers, then got them on, slow at first, then faster; they smeared the rain into an opaque film, and for some moments he had to really concentrate until the screen cleared a little.

‘Are you good with insects?’ Grace asked.

E-J grimaced. ‘Actually, no. How about you?’

‘Not crazy about them,’ he admitted.

He took the left turning she indicated, into a road of 1930s semi-detached houses – not unlike his own street, he thought. At the far end he saw a small industrial estate, beyond which the road went under a railway bridge. On the far side, on their left, were more semi-detached houses, then a busy parade of shops.

‘It’s here,’ the Detective Constable said.

Grace slowed, looking for a parking space outside the shops. He saw a bakery, a chemist’s, and a bric-a-brac shop with old chairs, a toy car, a pine table and some other artefacts spread out on the pavement; there was a medical centre next to it, and a sports trophy shop next to that, and then he saw what looked like a pet shop, its window full of small, empty cages. The sign above the window read: erridge and robinson – importers and suppliers.