Rosanne Boyland also died, crushed by the crowd. Some blame the police for firing tear gas and keeping her from getting an ambulance sooner.
Kevin Greeson and Benjamin Philips also died but it may not be related to the event.
Searched around and found this...
While initial reports claimed Boyland had been crushed to death amongst the crowds at the Capitol, the DC medical examiner ultimately ruled her cause of death was an amphetamine overdose.
Greeson and Philips died of hypertensive atherosclerotic cardiovascular disease.