DARVO is an acronym for Deny, Attack, Reverse, Victim, and Offender. It is a manipulation tactic used to avoid being held to account.
Betrayal Blindness
Betrayal Blindness is a term coined by Jennifer J. Freyd, Ph.D. to describe the phenomenon of human beings turning a blind eye to the suffering of others “when awareness would threaten necessary relationships.”
It can also be observed in the Bystander Effect.