My colleague is now in Luanda (as am I, thankfully on an Emirates flight) and confirms what was said above.
The flight left a day late, the full compliment of authorities were on the plane before any pax were allowed off (SOCO, Met, CID etc) statements were taken from pax and they were accommodated locally (mostly in the Sofitel) before the flight left 24hrs or so late.
The deceased was removed by coronors in a body bag - rumour on the plane is that he started to struggle, claiming his family were all in the UK and that he hit his head on something during a fall to the floor.
The return leg leaves LAD an hour earlier than normal tonight.