I've heard he had a gun. No proof of that.
I've heard he had a 'kill kit'. No proof of that either.
I've heard he had all kinds of stuff under his jacket. No proof here either.
Now it could be possible, though the girls did not know him, or recognize him, he may have known them.
Who knows right? It's all speculation.
I do think he was swift. I also think he was familiar with the lay of the land. I think he knew the girls were on that bridge long before they knew he was around. I also think the CS was pre-selected. I see him parking at the cemetery, walking to his observation point that he has already cased out, waiting. I see him simply accessing the bridge while the girls are on it, from either end, doesn't matter to me. I see him corralling the girls to the murder scene. I see him departing via that cemetery.
I also keep the possibility of an accomplice being involved.
It could be a random serial killing, but I have my doubts. Though, it certainly could be.
If there was no video, there would be little if any chance of ever catching him. Nearly the perfect crime. Even WITH the video, he has yet to be found.
The fact that he was so quick, in, out, and gone. Makes me think he's experienced, but not necessarily a serial killer. Either experienced, or a very meticulous planner. To the point of leaving no trace behind that could easily identify him. I think about this often. Quite a professional murderer. Or just luck? For now, I'm on the professional side of the fence. Experienced.
MOO