Schlessinger may have sexual proclivities, but has he ever been implicated in a violent crime? Rape? Kidnapping?
I think it's a good tree to bark up, but there are a lot of lascivious men out there that never act out their desires or fantasies with strong-arm tactics. They get turned down, stew about it for a bit, and eventually move on. This woman who filed suit...did she accuse him of physical impropriety in any way? And, I'm honestly curious, how often do mature men escalate from pervs to murderers?
I'm really curious as to the psychology of it all. I DO think it was someone she knew and absolutely someone associated with the school. He also would tend to fit the profile of my initial gut feeling, which is someone who coveted her, secretly or not, and got agitated as the wedding approached. That said, there could be a dozen men in that building to which that applies. I guess I'd look first at those with histories of violence or sex crimes.
I don't know how many of you watch CSI, but there was a season four episode called Butterflied (super dark, creepy Grissom/Sara episode) that is really making me think. It doesn't all fit, but the potential dynamics of a Schlessinger (or other professor) involvement would be pretty close. Older renowned doctor covets young protege (in this case it was a nurse, but I digress) and he killed her because he couldn't have her. He was obsessed with her and he was nothing to her, and brought down his whole career and reputation. Kind of a benign description, I know, but the writer did an amazing job of really speaking to the psychological drivers and motives that can turn these master/protege relationships bad.