It's enough to know that at the time he was gunning for a cop and preferably with the cop's own gun. And for him, the act of disarming started with a disarming smile.
In 1971, the Undisputed Truth had a hit with the song "Smiling Faces." Whenever I hear that song, I think of Mr. Griffith's well-affected smile.
Now, to be fair, the song asserts that "your enemies won't do you no harm, because you know where they're coming from." But it's getting them identified and on radar in the first place that's the problem, and first impressions at least as they relate to smiling faces and our profession can be an iffy proposition, at best.
For the smile can be variously interpreted as an invitation, a deferral, a threat. Such cultural differences are part of the reason China is encouraging its participants to use the smile, a facial expression that has historically had far greater ambiguity to it to cater to Western sensibilities when they host the Olympics.
Back at home when dealing with strangers in the scope of your duties it's best to remember that other lyric from “Smiling Faces,” the one that also asserts that "smiling faces tell lies," then ask yourself: “Would I be smiling at me if I was this guy?”