You decide you are going to kill someone by sliding into him and pushing him off a cliff?
Why not grab him by the handcuffs and collar and throw him off?
This story doesnt pass the smell test.
When something doesnt make sense; read the article.
The allegation is that he was kicked off the cliff, and then was executed at the bottom of the cliff (by another soldier).
Roberts-Smith did not kill the man (even allegedly). Apparently he just treated the farmer a bit roughly and another soldier at the bottom of the cliff killed him.
You have to get pretty far into the article before the story makes any sense. Typical MSM writing.