InSecurity (2011)

Alex is tasked with assassinating an assassin, a mission that becomes more complicated when her carefully laid plan backfires: JoJo's poisoning efforts go awry, a civilian ("Jeff from Paperclip Depot") gets involved and Claude goes rogue. With JoJo's life hanging in the balance, it all boils down to Alex and her sniper skills to take out the killer. That, and an elevator.