
144 Private Security and the Investigative Process, Third Edition
Information regarding tax returns can be secured by Internal Revenue Service (IRS) Authori za-
tion Form 2848-D, and an example of this form is shown in Figure 6.36.
VIII. PRESERVATION OF EVIDENCE
Collection and preservation of evidence and the assurance of its integrity during the investiga-
tive process are undeniable responsibilities of the public and private police system. Investigators
are continually concerned with whether the chain of custody of the evidence has been distorted,
broken, contaminated, abused, reformulated, recast, or changed in any signicant wa ...