This occurs when; closely working or in an interactive relationship with someone that defers blame unto another when blame is clearly, unreasonably, even illogically cast upon the other.

e.g. - The accused and the accuser have been working with a customer, together they complete the task with little resistance or drudging. Come to find out some file was signed or filed incorrectly, with the nature of many situations much time has elapsed and neither can decide who forgot what....