"Triece had been volunteering in the district for five years and passed a background check to do so. She can no longer volunteer at the school, but is allowed to chaperone field trips with her 5- and 10-year-old sons, NeJame said."
So she has been volunteering for 5 years, passed a background check, seems to be a decent mother and people are coming down on her for something that is not anything new? Sounds like to me that a few other moms were a little jealous of her and did what those types do and they penned that letter. In fact I would not be surprised if it was one or more of those parents she mentions she gets along with that were responsible for writing that letter to start this.