As a first impression, I find it strange MS is not wearing his wedding ring to an out of state wedding. What I don't know is: Was he wearing it otherwise daily?
As someone pointed out, he doesn't seem to have a tan line of it, which to me seems to mean he wasn't wearing it very often or he used to sunbathe/used tanning beds without it.
Maybe he lost it? Or MS has lost/gained weight and it did not fit anymore and has not yet brought it into a shop to adjust it. Or his weight fluctuated all the time, so it didn't made sense to adjust it.
I do find this information useful if one knows the answers to the questions above. Those answers could help us and LE to put those pictures into perspective.
If MS used to wear his wedding band daily and abruptly stopped wearing it, maybe if someone remembers the approximate date of it then it could help narrowing down the reason for it. That way LE could check if MS's phone habits has changed around that time frame. Or if he around that timeframe suddenly seemed to regularly disappear from the office or from home to meet someone, do something, like go religiously "to the gym".
Witnesses are needed who could place this into perspective.
I agree with hockeymom4, I too would need more info to make up my mind on it.