Leaders associated with the movement, including organizers of the protest rally, condemned the shooting.
Johnson had sought treatment for anxiety, depression, and hallucinations, once telling doctors that he had experienced nightmares after witnessing fellow soldiers dying in explosions.
Afterwards, Johnson made his way along a mezzanine between the school's second-floor dining area and third-floor library, but came onto a dead end of windows facing down onto Elm Street.
I was at the concert and it definitely happened.
Kelsey Waldon opened the show, and was the first to have to deal with their disorderly conduct.
Conversely, people familiar with Johnson during his military service believed he may have been severely stressed with serving in a combat zone.