Speak with Elder Su'Linh ( -517, 294, 3083 ) Copy/waypoint -517, 294, 3083 about how to dispose of the body.
Find and burn the body. ( 268, 126, 2749 ) Copy/waypoint 268, 126, 2749 The Corpse is on the path Just in front of Tox's Lair.
This is timed. You have five minutes to complete this step.
You might choose to evac and fly to the Toxxulia Forest station and then run to the body.
Or take your fastest mount and head down the ramp from the caves and go northwest to ( -220, 252, 2811 ) Copy/waypoint -220, 252, 2811 where you can run straight up the cliff wall and then jump west down into Toxxulia Forest pretty close to the body location. When you jump off the cliff, it would be a good idea to be wearing some type of featherfall cloak, so that you can land in the forest and not fall into open air.
Or head towards north end of Hua Mein village, jump up on the rocks and over the cliff, be there in 30 seconds.