Firstly, this is a tragedy for the families and friends, traumatic for the rescue personnel and may the deceased RIP.
Perhaps there are some lessons to be learned which may come to light after a proper investigation. In the meantime, knowlege of the runway in use could provide a time factor and possible thought process. The wind on 19th appears to favour 07. The crash site appears to be adjacent to the wetlands area, approximately 1nm NW of the airport. The direction of flight prior to impact can't be definitively determined from the inverted resting site, but may have been from a westerly heading. The gear is down. The flaps appear to be retracted. This would appear a less than ideal configuration for a planned ditching or energy management.
Stall/spin? I'd doubt the later due to the apparent damage from energy disipation. A proper investigation will be more telling.
Radio call? Bottom of the priority list, but if given may relay intent/ highlight priority management.
A sad situation. Let's wait for the formal report.