Nope, the district had no idea they were doing that until after the firing. I did hear the actual reason was because they were considering joining a union, but I didn’t stick around long enough to dig any deeper.
Since you seem to know all kinds of facts that discredit the school district, the superintendent, and the IT supervisor, yet "didn't stick around" to absorb info that might look bad for the group of employees, makes you a narrator who is difficult to believe is being objective and non-biased.