IMHO Vin Rouge has got it right, as has Roots radical.
If the AFS needs to enter an aircraft to rescue people, they will do so until impractical, often risking their own lives. Obviously if they know there are 3 living people on board and 2 dead bodies, they will stop putting their lives at risk once they have the 3 living people rescued!
Snips
POB is Persons, not PAX - there are many aircraft round that do not carry pax!