refers to establishing how and when a piece of evidence as received; how it was maintained or stored while in each person's possession; what changes, if any, it underwent in that person's custody; and how it left that person's custody.

The answer is Chain of custody.

Explanation:

In legal contexts, chain of custody can be defined as the chronological documentation or paper trail in which there is a record related to some aspects concerning evidence. They include the sequence of custody, control, transfer, analysis, as well as the disposition of evidence.

The term is also used in aspects related to civil litigation, in drug tests made in athletes, as well as in aspects regarding supply chain management. Chain of custody has been considered a difficult process to show evidence in court. Now however, with the establishment of new portable technology the chain of custody is considered much shorter and in this way, evidence can be processed in a better way.    

a.. a conflict between her competing identities.. apex