Trouble exploded in town around midnight when people left a bar and began throwing beer bottles at cars and breaking downtown store fronts. In the process they broke a bank window, setting off an alarm. The news spread quickly and it resulted in several bars closing early to avoid trouble. Before long, more people had joined the vandalism and looting.
By the time police arrived, a crowd of 120 had already gathered. Some people from the crowd had already lit a small bonfire in the street. The crowd appeared to be a mix of bikers, students, and transient people. A few members of the crowd began to throw beer bottles at the police, and then started yelling obscenities at them. The entire Kent police force was called to duty as well as officers from the county and surrounding communities. The decision to close the bars early increased the size of the angry crowd. Police eventually succeeded in using tear gas to disperse the crowd from downtown, forcing them to move several blocks back to the campus
Saturday, May 2
City officials and downtown businesses received threats while rumors proliferated that radical revolutionaries were in Kent to destroy the city and university. The decision to call in the National Guard was made at 5:00 P.M., but the guard did not arrive into town that evening until around 10 P.M. A large demonstration was already under way on the campus, and the campus Reserve Officer Training Corps (ROTC) building was burning. More than a thousand protesters surrounded the building and cheered its burning. Several Kent firemen and police officers were struck by rocks and other objects while attempting to extinguish the blaze. Several fire engine companies had to be called in because protesters carried the fire hose into the Commons and slashed it.[13][14][15] The National Guard made numerous arrests and used tear gas;
Monday, May 4
On Monday, May 4, a protest was scheduled to be held at noon, as had been planned three days earlier. University officials attempted to ban the gathering, handing out 12,000 leaflets stating that the event was canceled. Despite this, an estimated 2,000 people gathered
Companies A and C, 1/145th Infantry and Troop G of the 2/107th Armored Cavalry, Ohio Army National Guard (ARNG), the units on the campus grounds, attempted to disperse the students.
Just before noon, the Guard returned and again ordered the crowd to disperse. When most of the crowd refused, the Guard used tear gas. Because of wind, the tear gas had little effect in dispersing the crowd, and some launched a second volley of rocks toward the Guard's line, to chants of "Pigs off campus!" The students lobbed the tear gas canisters back at the National Guardsmen,
When it was determined the crowd was not going to disperse, a group of 77 National Guard troops from A Company and Troop G began to advance upon the hundreds of protesters
The guardsmen pursued the protesters over the hill, but rather than veering left as the protesters had, they continued straight, heading down toward an athletic practice field enclosed by a chain link fence. Here they remained for about ten minutes, unsure of how to get out of the area short of retracing their entrance path. While on the practice field, the guardsmen generally faced the parking lot which was about 100 yards away. For a few moments, several guardsmen formed a loose huddle and appeared to be talking to one another. The guardsmen appeared to be unsure as to what to do next.
They had cleared the protesters from the Commons area, and many students had left, but some stayed and were still angrily confronting the soldiers, some throwing rocks and tear gas canisters. About ten minutes later, the guardsmen began to retrace their steps back up the hill toward the Commons area. Some of the students on the Taylor Hall veranda began to move slowly toward the soldiers as the latter passed over the top of the hill and headed back down into the Commons.
Further analysis of the audiotape revealed that four pistol shots and a violent confrontation occurred approximately 70 seconds before the National Guard opened fire. According to The Plain Dealer, this new analysis raised questions about the role of Terry Norman, a Kent State student who was an FBI informant and known to be carrying a pistol during the disturbance.
According to recently released FBI reports,[citation needed] one part-time student, Terry Norman, was already noted by student protesters as an informant for both campus police and the Akron FBI branch. Norman was present during the May 4 protests, taking photographs to identify student leaders, while carrying a sidearm and wearing a gas mask. On August 13, 1973, Indiana Senator Birch Bayh sent a memo to then-governor of Ohio John J. Gilligan suggesting that Norman may have fired the first shot, based on testimony he [Bayh] received from guardsmen who claimed that a gunshot fired from the vicinity of the protesters instigated the Guard to open fire on the students.
Eight of the guardsmen were indicted by a grand jury. The guardsmen claimed to have fired in self-defense, a claim which was generally accepted by the criminal justice system. In 1974 U.S. District Judge Frank Battisti dismissed charges against all eight on the basis that the prosecution's case was too weak to warrant a trial
The Kent State incident forced the National Guard to re-examine its methods of crowd control. The only equipment the guardsmen had to disperse demonstrators that day were M1 Garand rifles loaded with .30-06 FMJ ammunition, 12 Ga. pump shotguns, and bayonets, and CS gas grenades. In the years that followed, the U.S. Army began developing less lethal means of dispersing demonstrators (such as rubber bullets), and changed its crowd control and riot tactics to attempt to avoid casualties amongst the demonstrators. Many of the crowd-control changes brought on by the Kent State events are used today by police and military forces in the United States when facing similar situations, such as the 1992 Los Angeles Riots and civil disorder during the aftermath of Hurricane Katrina in 2005.