I did some digging:
Katie: http://www.ugcleague.com/players_page.cfm?player_id=76561198253500983
Claimed previous account with CS:GO VAC: http://www.ugcleague.com/players_page.cfm?player_id=76561198129665269
Uberace: http://www.ugcleague.com/players_page.cfm?player_id=76561198188956631
Sharx: http://www.ugcleague.com/players_page.cfm?player_id=76561198115853449
All 4 accounts have the exact same IP. Of them, only Katie does not have a VAC ban. The other three have VACs from late June/Early July. Sharx and Uberace have shared a common steam name in the past - Leo Hoskins. The Uberace account has an STV linked to it where extremely obvious projectile aim assist is used (45 degrees+ from crosshair).
Also interesting to note is that the Katie account is the only account with more than a day's worth of UGC roster history - the Uberace account was kicked off from an Iron roster the day after joining due to the automatic VAC roster removal.