Sorry if I've missed this and it's been stated somewhere. I'm assuming police have talked with everyone from her work that was on that Teams call? While she was likely muted on the call, I'm curious if there were ever questions or statements directed to her to which she did not respond. Or on the flip side, at what times was she responding, either verbally or by chat, and if verbally, did she sound distracted or out of breath at all (like she was running after her dog, struggling with something etc)? Could narrow down an even tighter timeline or give a clue as to what happened. Example: at X time, this coworker asked her a question directly and she didn't respond.
Of course, I will have some meetings, if they are pretty large, where I really just have to listen in and never speak and the participants would have no idea if I was there or not.
Could be that she was mindlessly pacing while listening to the call. My husband and I both work from home. He does this ALL the time while on work calls. He just randomly paces our entire upper floor. I know when you are listening or concentrating hard on something, sometimes you aren't as aware of your surroundings as you should be. Was she mindlessly wandering about while listening in, didn't pay attention that she was too close to the edge/slope and then went in? MOO