Cowan explained: ‘I’ve prepared this report to help you gentlemen determine whether you should continue to explore the premise that Mike might have been killed by or at the behest of a dissatisfied client. I imagine that subsequent events make this possibility much less likely, but let us proceed anyway with our analysis.

‘My findings bear out the Dean’s view. Mike Mortimer was a very good criminal advocate. That’s a matter of record, not just of opinion. Even those who were convicted, tended to receive below-average sentences. Here’s a good example. A man convicted of a series of mortgage frauds: sentence three years. Now I happen to know that the Crown took a very hard line in that prosecution. Mortgage fraud isn’t common, but it’s easier to bring off than most people think, and they wanted an exemplary sentence.’

‘I know,’ said Skinner. ‘My fraud guys investigated that one. It involved obtaining twelve houses through fraudulent mortgage applications, renting them, often to DSS cases, to service the mortgages, and eventually selling on at a profit. The building societies were screaming bloody murder.’

‘Right,’ said Cowan. ‘So there’s the Crown, with a unanimous conviction, having dropped heavy hints to the judge, one of the harder Senators, by the way, that ten to fifteen years might be about right, and Mike gets to his feet. Next thing the Advocate Depute knows, the accused is a simple soul who had no real criminal intent, a poor chap whose wish to put roofs over the heads of homeless young people just got out of hand. The fact that he was enjoying their sexual favours as part of the deal was never led in evidence by the Crown. They didn’t think they needed it. By the time Mike has finished, there are tears in the eyes of the hanging judge, and his client goes whistling off to Saughton with only a three-stretch.

‘Here’s another: Strathclyde Police round up a really nasty tally man, a loan shark of the worst kind. The charges include serious assault, extortion, you name it. But the police witnesses were a bit sloppy, and one or two of the victims were clearly a bit wide themselves. Mike goes on the attack, and his client goes back to Castlemilk a free man, on a Not Proven verdict, to his astonishment and joy.

‘Then there’s the Chinese job. A young Japanese student at Strathclyde University - the daughter of an industrialist, resident in this country — is found raped and strangled. Two Chinese waiters are arrested. One of them has the girl’s knickers in his pocket. Mike and Rachel Jameson defend one each. They put up a lovely impeachment defence. First, they claim that the girl was into group sex, and produce three witnesses to that effect, one Chinese, two white. Then their clients allege that there was a third boy involved. Neither of the other two knows his name. They claim that the girl was a willing participant, that they left her behind with this bloke, and that he must have done it. Forensic evidence — semen samples and so on — confirms that there was a third person involved and the two lads are acquitted, fifteen — nil.

‘I’ve been through the rest of Mortimer’s court work. There is nothing else of any significance. One or two small-timers in jail for shorter terms than they expected, others free and happy, and absolutely no sign of anyone swearing vengeance.’

Skinner and Martin sat deep in thought. Murray looked frustrated.

‘Thank you, Peter,’ said the Dean. ‘Faced with that, we are forced more and more to the conclusion that Mortimer just happened to be in the wrong place at the wrong time. Such a damn waste. I almost wish you had found a link.’

But Skinner’s optimism had not dissipated. ‘I agree, David, I can’t see anything there either. Still, there is something. I know it, and I’ll nail it, and I’ll nail him. Can you find me transcripts of those three trials?’