I know a little something about microfacial expressions, and they don't work in a static picture. As a person is talking, little emotions and muscle movements run across their face. All of us non-autistic folk can recognize them although we often do it unconsciously. It's things like a smile without a certain eye crinkle, making it fake-or a quick eyebrow raise that denotes disbelief even though the person says they believe you. These expressions are often just a quick muscle twitch but give away clues to how a person really feels.
There are universities who have studied this, catalogued them, and they teach this type of thing to investigators. So presumably, Russ could find an expert in these microfacial expressions.
But they are going to be meaningless in one photo taken by a famous person when you don't know what she was saying before. She may have been thinking "ugh, I don't want to touch this hideous troll," but she's a professional. She gave a sexy smile, half eyes closed for the cameras, head back, arm relaxed on his shoulder. Her face is pretty expressionless actually, she was smiling for a camera, not at him. That's all anybody is going to see. If a video recorded a conversation she had with him, then maybe this expert could help, but even then it's not a hard science and a good attorney could handle it easily. If it would ever get to the point where that would be allowed.
Since Russ is moving from FB, please make sure to share where he goes. I don't know what other platform will work for him...can't wait to see though.