at 7000/8000 DA that a/c doesn't make a fuss about hovering at MTOW in light winds.
Moreover, 4 pax and 3 hours endurance on a police equipped 139 makes me believe about a TOW around 6200kg at the time of the crash....if this figure is correct and considering stable hover as everybody can see I don't think VRS or neither LTE would be the cause of such disaster.
TRDSF?
T/R control binding?
Maybe coupled by wrong pilot reaction?
Just my opinion