I do not call this misfeasance as the prefix "mis"can have connotations of messing up. Malfeasance means that they acted wrongly. This is even worse - they did nothing.
When the Catholic Church, especially that of the US, started getting nailed with massive civil penalties for failing to report knowledge of sex crimes and covering for the criminals in the clerical ranks, the Bishops finally got the message - Do your job or be wrecked financially.
"Gavin Boby, whose Law and Freedom Foundation gained attention for its “mosque-busting” efforts, has now launched a new initiative called “Never Shall Be Slaves”. His aim is to reach out to the young native British girls whose lives were ruined after they were turned into sex slaves by Muslim “grooming and pimping” gangs. He is offering them pro bono help in obtaining financial redress from the authorities who neglected to protect them:"
-The link at top has a video of Mr. Boby describing his work.