Ain't no co-inkidink!,,,,
My scenario... Karen got wind of all this jiggery-pokery of Borce's.. confronted him with it, and he murdered her, because his image of himself required it.. Which is what most domestic murders are about. She ruined his perspective of himself.
He had already lost $600,000.00 in his former adventure into the high life of entrepreneurial business, and then a short flirt with Vlasko, yet again, of burrowing into the racehorse industry, where people fail and fall instantly, mostly ..
He hadn't had a job since 2012, he'd bludged and wriggled his way around , he had the nerve to promote himself to Karen , of all people that he knew what he was about in regard to money, and business, although he knew bugger-all about the retail trade, but hey...