Computer Crime
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r;r,s. D'~partment of Justice Bureau of Justice Statistics National Criminal Justice Reference Service nCJrs This microfiche was produced from documents received for inclusion in the NCJRS data base. Since NCJRS cannot exercise control over the physical condition of the documents submitted, the individual frame quality will vary. The resolution chart on this frame may be used to evaluate the document quality . , -!... "":'~ ~.' -"""'':-; "' ...c._" .""'~"o.A",,,~.,,,~ .'... ...., "'':''''-"''--_._. '\. COMPUTER l,!;i 2 8 11111 . 11I111~ CRIME !j,g w /////3,2 2.2 ~ . .W ~3.6 . ,., . u: w I~ ... , . ... ~ 1.1 I.I.U':'~ 111111.8 " • ..... I, • 111111.25 111111.4 111111.6 , ' \ t: I MICROCOPY RESOLUTION TEST CHART NATIONAL BUREAU OF STANDARDS-1963-A = _. • i j ~ • "~"'-"" ••• ' -.. ..- "'~"""7 .•.•• ~" .r Microfilming procedures used to create this fiche comply with the standards set forth in 41CFR 101-11.504. Points of view or opinions stated in this document are : . those of the author(s) and do not represent the official DATE FILMED I position or policies of the U. S. Department of Justice. r if , . J \ 10/22/81; National Institute of Justice ~.) ~ .-.... ,- .- .... + • United States Department of Justice .~ Washington, D. C. 205&1 1/ Ii _ ..Jf' .' I .: ...... ..,. U.S. Department of Justice Bureau of Justice Statistics , U.S. Department of Justice Computer Bureau of Justice Statistics Crime Benjamine H. Renshaw Acting Director I Carol G. Kaplan Expert Director, Privacy & Security Staff Witness Manual U.S. Department of Justice National Institute of Justice This document hilS been reproduced exactly as received from the person or organization originating it. Points of view or opinions stated in this document are those of the authors and do not necessarily represent the official position or policies of the National Institute of Justice. Permission to reproduce this copyrighted material has been granted by Public Domain/Dureau of Jtistice Statistics to the National Criminal Justice Reference Service (NCJRS). Further reproduction outside of the NCJRS system requires permis sion of the copyright owner. - - ~--------------------- --------------,------------------ FORE\"lORD As the criminal justice ~ystem is confronted with increasing levels of computer related cr1me, and as efforts increase to bring sophisticated felons to justice, the use of expert wit nesses will represent an invaluable source of technical ass is tanc~ to investigato:s and prosecutors. This Manual attempts to exam1~e many of the 1ssues, ,factors and obstacles which may sur face 1n th~ use of expert w1tnessses. Criminal justice personnel contemplat1ng the use of an expert witness would be well advised to sensitize themselves to the issues raised within this document. This document was prepared for the Bureau of Justice As technology advances complicate the matters of evidence Statistics (BJS), u.S. Department of Justice (DOJ) by Koba a~d testimony in computer related crime cases, the use of experts Associates, Inc. under Contract No. J-LEAA-007-80. Points of w1ll become more and more prevalent. However, it is important to view and opinions stated herein are those of the authors and do re~ember that technical expertise can only be made effective when not necessarily represent the official position or policies of sJnll~u~ly directed, by well-informed and capable criminal justice BJS, DOJ or Koba Associates, Inc. p:act1tloners. It 1S for you, the practitioner, that the Expert W1tness Manual is intended. Copyright 1930 by Koba Associates, Inc. Benjamin H. Renshaw Acting Director Bureau of Justice Statistics BJS authorizes any person to reproduce, translate or other wise use any or all of the copyrighted materials in this publica tion with the exception of those items indicating that they are copyrighted by or reprinted by permission of any source other than Koba Associates, Inc. ! ! I i i , PREFACE TABLE OF CONTENTS Section Page The Expert Witness Manual is a simple, easy to understand reference tool that guides those individuals who need the Foreword .............................. •••••••••••••• It •••••• i assistance of experts in computer related crime investigations and prosecutions. It outlines for the reader how he/she should Preface ............. a •••••••••••••••• ....................... .ii proceed in the expert's selection. The Manual also details the economics that should be considered in the selection of an expert. It suggests sources which can be employed to tap an 1.0 Introduction and Executi.... ve S urnmary .•...•..••........... 1 expert, and how best to use these resources. 1.1 Purpose and Scope of This Manual •...........•..... 1 Further, the Manual details how best to employ and manage an expert. It proc~eds to define the legal powers of the expert, 1.1.1 Use of The Manual ......................... 1 and the potential legal liabilities that can ensue from the 1.1. 2 Organization of the ~-1anual ..........•.•.... 2 expert's activities. This Manual should prove of special value " , not only to investigators, but also prosecutors and defense 1.2 Overview of the Problem •..•..•.................... 3 attorneys: it outlines the economics of using computer experts at both the pretrial and trial stages. 1. 2.1 Definition of Computer Related Crime ...... 3 1. 2.2 Nature of the Phenomenon in the The Expert Witness Manual was written for both the public Context of vfuite Collar Crime ........... 5 and private sectors. It should prove of value not only to police 1.2.3 Unique Aspects of Computer Related officials and prosecutors, but also to defense attorneys, private Crime ................................... 8 consultants, corporate managers, accountants, internal auditors, 1. 2.4 Scope of the Problem Nationally ...........• 10 private investigators, students of criminology, and many others. 1. 2.5 Vulnerability of Computer Systems It marks a serious effort to assist both the private and public With the Growth of Computer sectors in combatting computer crime. Technician Cadres ....................... c> 11 1.3 Investigative and Prosecutive Approaches to Computer Re la ted Cr ime •••............... , .... 12 August Bequai, Esq. Washington, D.C. 1. 3.1 Case Complexity and the Need for Fall, 1980 Technical Assistance .••........•......... 12 1. 3.2 Problems Arising From the High Technology Aspects 'of Computer Related Crimes .......................... 13 1. 3.3 The Multi-disciplinary Team Approach to i Computer Related Crime Investigations .... 14 t- ;, 1.3.4 Utility of Outside Experts Assisting l \vi th Aspects of the Computer Related 1.. i Crime Case ............................... 15 t· 1.3.5 Caveats and Recognized Limitations on " .'J, the UfOse 0 u t S1'd e Experts ..•............ 16 rf; l' ,\' 2.0 Defining the Exp e r'~ an.d H'1S or H.er Role .••.....•....... 19 i: ~ f 2.1 tlExpert" Defined ................................. 19 f ~',' 2.1.1 Expert Witness Defined ..........•.......... 20 1 2.1. 2 Roles of Expert Consultant and Expert i' i Witness Distinguished for the Purpose t· of This Manual .......................... 20 t ii , ,', !. i? <!, • 7: Pc" I, fe r > , ---- ---- Table of Contents (Continued) Table of Contents (Continued) .?ection 2.2 Section Types of Expertise Distinguished b Source of Expert y ........' . .. 20 3.0 When to Employ an Expert. • . • . • . .. 35 2.2.1 The C~nfidential Informant/Technical 3.1 Computer Related Crime Cases Vary Greatly Advl.ser .........•........... in Complexity and Type .........•......•.•..•..•. 35 2.2.2 The "Loaned" Government EmPloy;~""""'" 22 2.2.3 The "Provided" Consul tant .........•. 22 2.2,,4 3.1.1 Need for Technical Assistance Will The Retained Consultant ................•. 23 Depend on Case Type, Complexity •......... 35 2.2.5 24 The Court Appointed 3.1.2 Number and Type of Experts Needed Will EXP~;~::::::::::::::::: 24 2.3 Depend on Case Type and Complexity ••....• 38 Types of Expertise Distinguished by SUbJ'ect Area Specialities • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 25 3.2 Philosophy and Capabilities of the Law Enforcement Agency Will Impact on the Use 2.3.1 General Experts • • • • • • • • • • • • • • • • • • • • • • • • • • •• 27 of Expert Assistance •......... ·••..••...••.•..... 39 2.3.1.1 Computer Scientists 3.2.1 The Reactive Appr.oach to Law Enforcement .•. 40 2.3.1.2 computer Related cri~~"""""" 27 3.2.2 The Proactive Approach •..........•......... 41 Researchers and Scholars .......• 27 3.3 Look First to In-House Resources .•......•....•...• 42 2.3.2 Subject Matter Experts from Various 3.4 Factors That Will Determine Whether and Where Data P:o;'ider and Computer User to Turn to Outside Expert Assistance ............ 43 Commun1 t1es ...........• 2.3.3 Computer Technologists ...•...•.......•.. 27 ..................... 29 3.4.1 Nature and Complexity of the Case ..••...... 43 3.4.2 Case Sensitivity ........•.••••........•.... 43 2.3.3.1 3.4.3 Previous Experience With the Use of Electronics Engineers •.....•...•.. 29 2.3.3.2 Telecommunications Engineers Experts. .. 45 29 2.3.3.3 EDP Programmers .....• 3.4.4 Fiscal and Budgetary Considerations ....•..• 46 2.3.3.4 30 3.4.5 Availability of Local Resources ..........•. 46 Systems Analyst~:::::::::::::::::: 30 2.3.3.5 Database Managers .....•........... 30 4.0 Selecting an Expert .................................... 47 2.3.4 EDP Au d'1. tors ............. 2.3.5 Computer Security Speciali~~~··· ........••• 31 4.1 Financial Considerations ....................•..... 47 2.3.6 Hardware and Software Manufac~~;~;~········ 31 and/or