I tend to agree with this. (Sometimes I think it was a hired hit, and I don't think a hired hit would be outraged and full of hate.)
So...who would hate Missy? In my current theory that business is the motivation for the murder, I'm thinking that the perp could be someone who wanted Missy silenced because she knew something that could hurt the perp's business, reputation, and pride.
I have no idea who that could be or what the details are...but something about it seems to fit more than a romantic tangle.
Maybe a clue is in knowing why Missy stopped going to the gym.
JMOpinion, subject to constant change on this case.
She stopped going to the gym and then announced this date on FB. She knew it was dangerous but obviously thought the danger was over. No one was there, so she was fully aware that she was the only one. Was she there to meet someone? Expecting someone differnet than who she thought would be there? What crazy dis, did she invite? I see more jealousy than anything really. I think FB is a waste of time and no one knows me via Facebook.
Also- heart surgery can effect a gait- arterial issues. Who has a heart problem? heart surgery? heart valve problem?