S1983, Title IX
A municipality's retention of an employee after an offense does not establish that the municipality is liable under S1983 for similar offenses.
Allegation of insufficient screening is not enough to state a claim for S1983.
As there was no actual notice of improper relationship during the pendency of the relationship, no Title IX violation.
School investigation is not an adequate substitute for notice of claim requirement that requires, at minimum, a written police report.
https://www.cadc.uscourts.gov/internet/opinions.nsf/A69B5A2CB744D2E485257F2A005480B2/$file/14-7189-1590902.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.