'Who would have forged a letter like this?' His stomach lurched as the realisation struck him. 'Me? You think I might have written it?'
McGarvie gave a prim tug at his tie. 'Quite possibly, as a diversionary tactic. I decided to have it tested for prints. And have a graphologist look at it. You'll be relieved to know it's genuine. And we found no trace of your prints.'
'What do you mean: I'll be
'Noted.'
'You could still have informed me when you found it' 'Yes.'
'But you chose not to. Why?'
'If you
'Nice,' he said as the deviousness struck home. 'You thought you could trap me into saying something about it when I wasn't supposed to know it existed. Well, thanks for the vote of confidence.'
'My priority is to get to the truth, Peter, not pander to your feelings. You know as well as I do that in major crimes it's standard practice to keep back certain information.'
He took a long, deep breath, trying to tell himself to stay cool this time. In McGarvie's shoes, would he have played it the same way? He couldn't be certain. The one sure thing was that the suspicion was real. It riled him that his so-called colleagues treated him as the major suspect. By now he should expect nothing else. He needed to put aside his anger and deal with the new evidence. And it was good news. It put him back on side, didn't it?
'If the note is genuine, then you know I didn't use the gun.'
'How do you work that out?'
He spread his hands to emphasise the obvious. 'Well, if Steph buried the gun herself, I couldn't have shot her with it.'
McGarvie shook his head. 'It's not so simple. She could have told you she'd buried it. She had every intention of telling you, just as she says in the note. It's possible she told you on the day the Carpenter trial ended.'
'Well, she didn't.'
'Then I ask myself how you reacted,' McGarvie ploughed on, ignoring Diamond's denial. 'You'd certainly have dug the gun up. You may have had a blazing row about it, just as she feared. It could have been the reason she was murdered. No, hear me out. If you shot her yourself, you had a neat get-out. Bury the gun again, with the note as your alibi.'
The blood pressure rocketed. 'You don't give up, do you?'
'Would you?'
He ignored that question and asked one of his own. 'If we had a blazing row and I shot her in the heat of the moment, how is it she was killed in Royal Victoria Park?'
'I didn't say anything about the heat of the moment. This was a planned murder.'
'What - to punish her for burying my gun?'
'The motive has never been established.'
Conversations with McGarvie were an incitement to violence. He bit back his resentment and tried all over again. 'Have you heard any more from ballistics? It's beginning to look as if mine wasn't the murder weapon.'
'They say they can't prove the bullets were fired from that gun.'
He held out his hands in appeal. 'So?'
'There's still a good chance they were.'
'What do you mean?'
'There are points of similarity, but insufficient for legal proof. As you know, the bullets weren't in the best condition. They may have been tampered with, prior to firing, to hamper the investigation.'
'How?'
'By scratching the jacket, or scoring it with a file to distort the rifling. It suggests a professional gunman - or someone with a knowledge of weapons.'
'Like an authorised shot?'
The drooping lids of McGarvie's eyes lifted a little, but he said nothing.
'Is that their last word on the subject?'
'Apparently.'
'Trust the men in white coats to foul up. So it's back to the drawing board, is it?'
McGarvie said with an air of self-congratulation, 'We're going on
'So you admit you've run into the sand?'
'Not at all. It's the right move at this stage. There must be more witnesses out there. After all, this happened in daylight, in the open, close to an enormous car park. We still haven't traced that jogger.'
Diamond had dismissed the jogger from his thoughts. This was the woman Warburton had claimed he spoke to at the scene.
McGarvie added, as if Diamond had never seen
