It seemed that the investigation onto the footprints close to the beach that was made as a result of Damien dragging Leo along had allowed them to followed the clues all the way up to the empty circular area within the forest that was devoid of trees. Leo remembered that this was where Hunter had fought with Damien in order to safe himself from captivity.
However, what he did not know what that later in the night, Hunter was also led there by Damien and Mike's goons in order to have their showdown that led to the multiple deaths and Hunter's subsequent mental breakdown.
Since the "cleaners" from Ares International were professionals at their job, all traces of the crime scene from the night before were completely wiped away. Due to the fact that they were currently outdoors, the smell of bleach used when washing the blood had already been swept away by the morning wind and mist a long time ago.