Not only is this event plausable it's based on the Texas Univ. shooting of a former Marine in 1966. August 1, 1966 - In Austin, Texas, Charles Joseph Whitman, a former US Marine, kills 16 and wounds at least 30 at the University of Texas while shooting from a tower. I'm fairly certain there was a movie made about it, too.
Review of The Park Is Mine
The Park Is Mine
(1985 TV Movie)
NOT implausable - based on Texas Univ. tower shooting 1966
19 November 2018