A lawsuit has been filed against Plano ISD, alleging that the district ignored warning signs prior to a teacher's arrest. The details of the lawsuit are being reported by NBC 5 Dallas-Fort Worth. Further information about the lawsuit and the events surrounding the teacher's arrest can be found through this news source.

The lawsuit claims that Plano ISD was aware of certain warning signs but failed to take appropriate action. For a more detailed account of the allegations and the lawsuit, readers can refer to the coverage provided by NBC 5 Dallas-Fort Worth, which is investigating this matter.