My thoughts are with her and her family.
Sounds like there was a Snapchat late that evening (so after her run....unless she went for another AM run) and the outfit she would have worn to work is not found.
What's intriguing to me (for all newer cases like this) is the data footprint. The one article mentions supeonas to social media providers/Google....also mentions her Fitbit. Obviously that takes time (and in missing people cases that isn't good...more time)...but you just think of all the info we have out there and how three could be clues (say a creep sent a weird fb message, liked a bunch of photos, etc). I know I'm weirded out when my phone tells me where I went in a day, Google may have those types of data points)