At this point , both of these killers will have to quickly throw each other under the bus, she will have to place his hands, metaphorically , on the steering wheel of the Prado, and he will have to distance himself by some big measure from the event. No doubt there is sufficient evidence via text, of the conspiracy element, email, etc, probably as she drove around that morning, he may have had to buck her up a bit, keep her mind on the job , so to speak.
I don't see them as a sort of Bonnie and Clyde outfit, though. There does not seem to be any financial gain going on here.
Just for Americans, AU does not have alimony stuff. The taxpayer chips in to support single mums, these babies these two girls have were by choice, abortion and family planning is a matter of health care, neither encouraged or forbidden, a matter solely between a woman and her doctor, he still has to pay for his daughter regardless. It is difficult , from here, to see how Keisha's death was the only solution to some problem they had. What that problem was, that required such a blatant , public, terrible death is still a mystery, but it obviously over rode any other solution they may have come up with.
There seemed to be no getaway plan, either. It was as if they both believed that life for them would go on. Go home, have a cup of tea, make a few tik toks, have a ciggy, ...... she was in custody in 5 hours, him in 10. No apparent attempt at a getaway process, no passports, travel tickets, nothing... .. as if, well.. another day... nothing to see here...
Who looked after her babies while she was out running down people on the pavement, not known, nor who's car it is, either.
Somewhere in this murder , there is a mystery, of a strangeness not found usually.