Richard Nixon's speech after four students were killed at Kent State. No one had threatened law enforcement; they simply determined that the approach of questioning authority should be met with lethal violence. The more things change, the more they stay the same.
Ten days after the incident at Kent State, there was a similar protest at Jackson State University, a Black college in Mississippi. Police came, sprayed bullets into gatherings of unarmed students, and actually fired shots into dormitory windows, killing two and injuring nine. The media did not make a big deal of it, though.