Malfeasance vs. Misfeasance vs. Nonfeasance

wrongful conduct by a public official

The mayor was convicted of malfeasance.

doing a proper act in a wrongful or injurious manner

liable for misfeasance

A failure to act when under an obligation to do so; a refusal (without sufficient excuse) to do that which it is your legal duty to do

it was nonfeasance on their part because they were responsible