Personally, I'm not against sport hunting of lions, in season and within the bounds of sportsmanship, SuperMag. You might be surprised to hear that I also happen to think that the ban on hunting them in CA was politically hysterical, disingenous, completely unscientific, and wholly unfounded.
Similarly, there are too many accounts of out-of-season killings of cats claimed to be attacking but which prove to be unfounded--perhaps the majority of them. There's a whole bunch of hysteria, but very little substance or science, to the claim that ML are wanton man-eaters.
Look, it's unlikely that anyone else knows the whole truth of this but the guy who was there. I wasn't, don't know anyone who was, and can't offer an judgement about the veracity of this particular instance. Statistically speaking, it does seems improbable, though.
And yet I do think it makes for a good hunter ethics discussion to wonder hypothetically whether the hunter called the thing in with an elk call. (He was presumably out hunting something else, right?) If he did, and sat there motionless and hunkered down in full camo while the thing snuck in, and then killed it at 42 feet without first attempting to drive it off, with lions out of season, not possessing a lion tag, etc.-- well, l feel qualified to offer the opinion that a hypothetical like this constitutes either unsportsmanlike behavior, a bit of paranoia, not knowing much about lions, or a combination of all three.
LionHo