‘Because we now know that you’ve instructed your solicitors to contest his will. Your father, for reasons that are not yet clear, left his whole estate to a rape crisis charity. That’s the proceeds of sale from his home, some stocks and shares, one classic car that’s in storage and any cash left in his accounts. We don’t have a figure on the cash yet, but our best estimate for the estate is that it’s worth £800,000. Without the bequest to the rape crisis charity, you’d have been the sole heir. It seems reasonable to think you might have been more than just a little angry about that.’

In the corner, grateful that neither Graham nor Monroe could see her face, Ava tried to keep her breathing steady. The investigation had stumbled across a perfectly legitimate issue that could provide a motive for Bruce Jenson’s murder, yet she was unable to pass on the information she had about why Jenson had an interest in a rape charity without immediately implicating Callanach as a suspect. If she did that, and she knew she should, it would become clear that crucial information about Callanach’s reasons for visiting the nursing home had been withheld from the start. It didn’t matter that she was convinced Callanach had nothing to do with Bruce Jenson’s death. This was about something more fundamental. Honesty, openness and legal procedures.

‘That’s my money. I’m entitled to it and I’m allowed to have my lawyers challenge the will. It doesn’t mean I’ve done anything wrong,’ Andrew snarled.

‘You’re right, it doesn’t, but when we found out about it, we had cause to re-examine the timeline you’d given. So now we need to know where you were between leaving work and arriving at Prashant’s,’ Graham explained calmly.

‘None of your fucking business,’ Andrew shouted.

Ava studied Andrew’s body language. His arms were tightly crossed, high over his chest, almost a self-hug. His shoulders were hunched inwards. He was as far back in the chair as he could get, away from Graham, but bolt upright. Ready to flee if the fight got too much for him in evolutionary terms. His jaw was switching from left to right, like a swing boat beneath his face.

‘Okay, you can pass on any question you like while you’re not under arrest. Let me move to a different subject. Do you have any idea why your father was prepared to be so supportive of a rape charity?’