Answer:
Forensic animator.
Explanation:
A forensic toxicologist refers to a professional or an expert who is a certified investigator in determining and identifying the presence of hard drugs or poisons in the body by scientifically testing bodily fluids and tissues.
This ultimately implies that, forensic toxicologists are certified professionals (investigators) who are saddled with the responsibility of collecting evidence e.g presence of alcohol, hard drugs, or poisons, after an unfortunate incident such as murder has occurred. This is to determine whether or not the evidence collected at the crime scene, from the victim or suspect are connected to the crime.
Forensic animator: provides digital 3D crime scene reconstructions that can be manipulated to test different theories and sequences of events.
A chain of custody can be defined as a paper trail containing the chronological order of items of evidence and how they have been handled, controlled, transferred, analyzed, and disposed during the investigation of a case.
This ultimately implies that, a chain of custody contains all the details or informations regarding the investigators (people) who handled, controlled, transferred, analyzed, and disposed an evidence in the course of carrying out investigations on a particular case. The most important and significant part of an investigation is the evidence because it helps to unravel the truth and facts relating to a case. Therefore, it is very important and essential to document and maintain a chain of custody so as to preserve the evidence.