Because this murder, and as a consequence of that murder, this trial , is all about the money. What amount, who owned what, who held on to what, who distributed it, who owed who, who wouldn't pay back what was owed, who had more, who had less, who felt entitled. All about the money, the money, and not a lot more. Not sex, not religion, ( unless that turns out to be some ditzy defence Borce suddenly pulls out of a hat ) but money.
And, my opinion, not large amounts , either. That is, nothing in the multiple millions. Just odd sums hither and yon. Bits and pieces, dollars and cents, nickels and dimes as our cousins would say. $100,000.00 here, $70,000.00 there. $ 1500.00 that sticks in someone's craw. Debt. Borrowings. Stupid failing quick money schemes. Lots of big talk and small sums. Gossip and rumour acted on as if it were financial advice from qualified , certified advisors.
In short, all the usual stuff. The absence of a sexual motive is uncommon, but not altogether rare. Money is a terrific aphrodisiac , the thought of it, the contemplation of it, the clear vision of it falling into one's own empty pocket, ... all very mesmerizing.
And an annoying wife, who knows a lot. And has inherited money which doesn't seem to be finding it's way into the pie the sky schemes of the head of the household.....