I think that would make more sense. The Youtube I'm talking about is Day 4, Pt 3, and at the 3 minute mark Rivera starts asking him about the helicopter search. He says mile post 18, multiple times.
Makai side Hana highway, guardrail, sheer drop of several hundred feet after a couple feet of vegetation. Drag marks under the guardrail, broken depressed vegetation like something fell on it. OK, maybe not an ocean cliff, because he tells the helicopter search to check the valley floor at the bottom of the cliff (10 minute mark), repeats MM 18 at 11 minutes. 13 min and they talk about the "repelling" done by the civilian searchers. Then the testimony switches to Nua'ailua ... but they said MM 18 over and over during the ten minutes.
Peter Tosh, the YouTube time references are in reply to your earlier request.