CPI Evidence Collection & Documentation 3

Question 1

When collecting biological evidence at a scene, which packaging material is preferred to prevent degradation?

Accepted Answer

Paper bags or envelopes

Answer

Paper packaging allows biological evidence to breathe, preventing the moisture buildup that promotes mold and bacterial degradation.

Question 2

An investigator is reviewing recorded surveillance footage as evidence. What is the most critical first step?

Accepted Answer

Verify the timestamp accuracy of the recording device

Answer

Verifying timestamp accuracy ensures the footage accurately reflects when events occurred, which is foundational to its evidentiary value.

Question 3

What is the purpose of using a scale or ruler in evidence photography?

Accepted Answer

To provide a reference for the actual size of evidence items

Answer

A scale placed next to evidence in photos allows viewers to accurately gauge the size of items depicted.

Question 4

Which of the following is NOT a characteristic of a reliable written investigative report?

Accepted Answer

Inclusion of the investigator's personal opinions as facts

Answer

Reports must distinguish between objective facts and the investigator's opinions, and personal opinions should never be presented as established facts.

Question 5

A witness recants their statement after initially cooperating. What should the investigator do with the original documented statement?

Accepted Answer

Retain the original statement and document the recantation separately

Answer

Both the original statement and the recantation are relevant evidence; altering or destroying documents could constitute obstruction.

(CPI) Certified Professional Investigator Practice Test

(CPI) Certified Professional Investigator Practice Test

CPI Evidence Collection & Documentation 3