That's an interesting anecdote Pain. You could have intervened as the young lady requested, however you did the right thing by holding back.

Back in the late 80s when myself, brothers and Dad were working on an isolated property in the countryside, we had noticed a stoat swimming in one of the owner's trout ponds. It was trying to catch two moorhens with no success.

Later that day we were up on the scaffold when we heard a squeal. The same stoat (I assumed) had a baby rabbit by the back of its neck. I said to leave it but my Dad wanted to step in. I inspected the rabbit which was dead, so left it where it was, assuming the stoat would return. And about an hour later it did.

Intervening is a very natural and human thing to do, but predators have young to feed.