From your Wikileaks source:

BODIES AND WOUNDED, HOWEVER, BEGAN TO ARRIVE AT THE RED CROSS STATION INDICATING THE EXTENT OF THE FIGHTING AND THE FACT THAT REAL BULLETS WERE BEING USED. (…) HE WATCHED THE MILITARY ENTER THE SQUARE AND DID NOT OBSERVE ANY MASS FIRING OF WEAPONS INTO THE CROWDS, ALTHOUGH SPORADIC GUNFIRE WAS HEARD. (…) GALLO SAID WOUNDED, INCLUDING SOME SOLDIERS, CONTINUED TO BE BROUGHT TO THE RED CROSS STATION. (…) THEY CIRCLED THE RED CROSS STATION AND BEGAN YELLING AND THROWING STICKS AND DEBRIS OVER THE HEADS OF THE PEOPLE AT THE STATION. THE MEDICAL PERSONNEL PANICKED AND FLED, LEAVING BEHIND THE WOUNDED. (…) THE FEW THAT ATTEMPTED TO REMAIN BEHIND WERE BEATEN AND DRIVEN TO JOIN THE END OF THE DEPARTING PROCESSION. (…) THEREFORE, HE COULD NOT COMMENT ON REPORTS THAT STUDENTS WERE AMBUSHED AND SLAUGHTERED IN THE ALLEY JUST WEST OF THE SQUARE NEAR THE BEIJING CONCERT HALL. (…) ALTHOUGH HE DID NOT ACTUALLY WITNESS ANY LARGE SCALE SHOOTINGS ON THE SQUARE PROPER, GALLO SAW MANY CASUALTIES BROUGHT INTO THE SQUARE AND DID NOT DOUBT THAT HUNDREDS OF PEOPLE IN BEIJING WERE KILLED BY THE ARMY ON JUNE 3 AND 4.

That’s not exactly what i call a denial of state violence.