On October first, 28 year old Kymberly Suchomel was at the Highway 91 concert for the shoorting. She managed to escape uninjured, despite people in close proximity to her getting shot and dying.

Three days later, she makes a public post on Facebook recounting her experience that night, and specifically pointing out multiple times that there were multiple shooters. Gun MEN. Of that she is "100% certain" and openly wonders why nobody is reporting that.
Her Facebook post has started going a bit viral, and gets shared around.

Fast forward to October 9th. Sometime between her husband leaving for work that day at 4:30 am (leaving Kymberly at home) and her mother showing up to pick up Kymberly's daughter at 8:30 am, Kymberly dies.

On October 10th (and again on the 11th), local Portsmouth, NH news outlet SeaCoastOnline.com runs a story about her death. Their article pushes the 32nd floor shooter, and makes no mention of her assertion that there were multiple shooters. Her death can be confirmed by an online obituary, and by a statement on her charity's web page.

Fast forward to October 13th. Between 8:45 and 9:15pm ET, Kymberly's multiple Facebook posts about the shooting and what she's been going through since are all deleted (or made private). All Facebook posts linking back to her her posts start showing the link as not working.

And here's the even creepier part. I personally saw a discussion thread about her post on a private Facebook group get deleted in that time frame, too. So it appears that Facebook or powers above it are trying to wipe her testimony from public visibility.
For now, the Wayback Machine still has an archive of her post
.
https://web.archive.org/web/20171013150737/https://www.facebook.com/kymberleyjo/posts/10210907614435016

Also Rense has posted an article wherein he quotes her posts verbatim.

http://www.rense.com/general96/unhurtdies.html

I tell you, it's seriously creepy watching posts and articles start disappearing like that!