A pub manager from the UK died following a severe allergic reaction to takeout curry made with a ground nut mix containing peanuts, instead of the usual almond powder.
Dean Lucas and Adam Coleman have been missing since November 21.
On Saturday, Queensland police announced that a decomposed body had been identified as Tiahleigh. Sunday night saw 400 people attend her vigil.
The stories of four people who directly caused someone else's death in one way or another.