[Wayne07]

This info is from 4chan, so take it with a grain of salt, but here is a picture they are saying is off the shooter - egg man. I can see how some may have thought the shooter was female initially..

http://i.imgur.com/cw3v9v5.jpg

[halo66]

That’s a dude!!!???????????

[Charles Martel]

YouTube channel, allegedly belonging to "eggman":

https://www.youtube.com/channel/UCn1fwrq_QO0WkzBjdIM-8uQ