Alan Caddell is a Commander with the Santa Ana Police Department. He holds a Master of Arts in Education from Pepperdine University and is a graduate of the POST Master Instructor Development Program. A trainer for over 15 years, Alan has extensive experience and expertise in the area of instruction design and technology. Alan has taught advanced PowerPoint and on-line training for POST and other law enforcement presenters and is currently teaching a variety of programs.

Alan Caddell is the Co-author of Crime Scene Investigation.  According to the book description, “Focusing on the basics of crime scene investigation as it should be done by professionals, this book shows how to do a perfect job; its emphasis is on proven evidence, collection, and analysis. It provides a high level of relevant and realistic information needed to process crime scenes in today's environment. Generously illustrated with photographs, the book clearly demonstrates techniques used by field and lab personnel to preserve, process, and analyze a wide variety of evidence. Career profiles of working professionals in the field and actual case histories document how crime scene investigation is successfully used to solve crimes. For professionals in a variety of forensic science fields, including firearms examiners, fingerprint examiners, serologists, toxicologists, photographers, journalists, crime scene investigators, and others in the field of law and law enforcement.”

According to one reader/reviewer, “As a former police reserve officer, I spent years requesting CSI with little understanding of just what they do. This book goes well beyond lifting fingerprints and other routine tasks that police officers are typically limited to. I now have a better awareness of the capabilities of CSI and considerations about how to protect a scene and how CSI can be used to investigate certain crimes. I also have a greater appreciation for CSI personnel and the difficult job they have. I liked the book and believe it would be helpful to anyone in law enforcement.”

A former lieutenant with the Santa Ana Police Department (California) and professor emeritus from Santa Ana College, Thomas F. Adams is the author of five books: Introduction to the Administration of Criminal Justice; Training Officers' Handbook; Harden the Target : A Guide to Defense of Life, Limb, and Loved Ones; Law Enforcement - An Introduction To The Police Role In The Community; and Police Field Operations. He is the co-author of a sixth: Crime Scene Investigation.

According to the book description of Crime Scene Investigation, it “serves as a useful handbook to guide the law enforcement professional through the important process of crime scene investigation. Attempts to help the crime scene investigator accomplish the goal of doing a better job and raise accepted standards”

Inspector Mark Hawthorne is a 28 year veteran of the San Francisco Police Department. He has been assigned patrol, field operations and investigations.  His current assignment is Crime Scene Investigations.  As a POST instructor he specializes in Instructor Development, Preliminary Investigations and Crime Scenes.  As a an adjunct faculty member of the City College of San Francisco Administration of Justice and Fire Science Department he acts as an advisor to the Forensic Science Club. Inspector Mark Hawthorne is the author of First Unit Responder: A Guide for Physical Evidence Collection for Patrol Officers and Fingerprints: Analysis and Understanding.

According to the book description of First Unit Responder: A Guide for Physical Evidence Collection for Patrol Officers, “Physical evidence cannot be wrong; it cannot perjure itself; it cannot be wholly absent. Only its interpretation can err. Only human failure to find it, study and understand it, can diminish its value." -Presiding Judge, Harris v U.S., 331 U.S. 145 (1947) HOW TO MAINTAIN THE INTEGRITY OF THE CRIME SCENE WHILE CONDUCTING AN INVESTIGATION.  First Unit Responder: A Guide to Physical Evidence Collection for Patrol Officers is a training guide and reference for patrol officers and criminal investigators, who conduct preliminary investigations of crime scenes, to aid in identification, collection, and booking of physical evidence. Written by a veteran of 24 years of law enforcement, the book stresses the importance of understanding the critical nature of physical evidence and preservation of the crime scene as part of the case against a criminal defendant. This book is an important tool for police academies that train recruits and veteran patrol officers, as well as for students of criminal justice who seek guidelines for proper collection and handling of physical evidence”

According to Corporal Andreas K. Mendel, NCO in Charge, Forensic Identification Section, West Vancouver Police, in Canadian Society of Forensic Science Journal, “Mark Hawthorne's easy writing style and use of personal anecdotes make this book a relaxed read. First Unit Responder is a good resource for recruit training or criminal justice/criminology students, or as review material for seasoned investigators.”

Lou Savelli, who has spent all of his 23 years in law enforcement in the streets, is one of the most decorated officers in NYPD history and has received over 100 medals for bravery, outstanding police work, life saving rescues, and record setting investigations. He retired in 2004 as the Detective Squad Commander of the NYPD's Terrorism Interdiction Unit, which he co-founded after 9-11-01 as a proactive counter-terrorism investigative unit responsible to aggressively seek out and investigate terrorist cells in New York.

Lou Savelli was chosen as one of the top 10 of NYPD's most effective leaders of all ranks (out of nearly 20,000 qualified supervisors) and the first supervisor featured in NYPD's Leadership Training School newsletter because of his innovation and success in the field of leadership. He created NYPD's first citywide gang unit called CAGE (Citywide Anti Gang Enforcement) which was awarded the National Gang Crime Research Center's award for The Most Effective Gang Unit in the US.  Lou Savelli is the author of eight books in the “Pocket Guide Series:” Guide to Basic Crime Scene Investigation; Gangs Across American and the Symbols; Graffiti Pocket Guide; Street Drugs Pocket Guide; Practical Spanish for Law Enforcement; Identity Theft; Cop Jokes; and A Proactive Law Enforcement Guide for the War on Terror.

According to the description of a Guide to Basic Crime Scene Investigation, “An outstanding resource to have with you at every scene! Covers the time tested investigation strategies that ensure ironclad cases and successful prosecutions. Includes step-by-step instructions on appropriate approach tactics: scene search strategies; evidence collection; interviewing witnesses; closing a scene; initial documentation techniques; controlling the media; and,  establishing and securing a scene.  It also includes helpful photographs, diagrams and illustrations to facilitate understanding.”

Steven C. Drielak is a retired Lieutenant from the Suffolk County District Attorney’s Office.  His last assignment was as the commanding officer of the Environmental Crimes Unit. After leaving the Suffolk County District Attorney’s Office, Steven Drielak became the Director, Homeland Security Program, U.S. Environmental Protection Agency.  Steven Drielak is the author of Hot Zone Forensics: Chemical, Biological, and Radiological Evidence Collection and Environmental Crime: Evidence Gathering and Investigative Techniques.  He is also the co-author of Weapons of Mass Destruction: Response and Investigation with Thomas Brandon.

According to the book description of Environmental Crime: Evidence Gathering and Investigative Techniques, “The purpose of this book is to guide the new criminal investigator who is about to enter the highly-regulated and complex field of criminal environmental investigation. This type of criminal investigation has a "steep learning curve." Every hazardous waste evidence-gathering operation is strictly regulated by numerous laws and mandated procedures. This book has been written in a format that will take the new investigator successfully through this learning process. In addition, the text provides the comprehensive procedures and techniques necessary to successfully complete a criminal environmental investigation. Some of the major issues addressed include training, equipment, available resources, gathering probable cause, search warrant team structure, search warrant execution, gathering evidence in a hot zone, drum tracing techniques, and sampling and analysis for criminal evidence. Each of the investigative techniques and procedures described in the book have been successfully used in criminal environmental prosecutions, and each chapter has been designed as a comprehensive reference to assist the environmental investigator with the individual tasks he or she may face.”

According to the book description of Hot Zone Forensics: Chemical, Biological, and Radiological Evidence Collection, “Hot Zone Forensics is a detailed description of the evidence collection protocols that will be required in criminal cases involving the release of a chemical agent, biological agent, or radiological material. This book sets the standards for the methods that may be used by local, state and federal investigative law enforcement officers when locating and collecting hazardous evidence in airborne, liquid, solid, surface and dermal form. Sampling protocols from OSHA, NIOSH, EPA, DOE, CDC, Chemical Weapons Convention, and the Biological Weapons Convention have each been examined in an effort to provide law enforcement with a clear understanding of the many underlying evidence collection and prosecution issues associated with this type of criminal evidence collection. Detailed evidence collection protocols and equipment requirements for chemical, biological and radiological evidence are provided along with complete explanations as to why each protocol is recommended. The recommended collection protocols provided in this book have been designed to meet the many rigorous challenges that may be faced during the criminal trial process. Criminal investigators and prosecutors will find this book a useful guide when establishing their own evidence collection standards for chemical, biological, and radiological evidence.”

Michael W. Byrd joined the Miami-Dade County Police Department in 1985.  He began working in their Crime Scene Investigation Bureau in 1987.  Michael Byrd passed away in 2004.  Michael Byrd published over 30 articles on crime scene investigations and evidence handling.  He is the author of Crime Scene Evidence: A Guide to the Recovery and Collection of Physical Evidence.

According to the book description of Crime Scene Evidence: A Guide to the Recovery and Collection of Physical Evidence, “The purpose of this book is to give the investigator a quick and easy reference guide to the collection, handling, and packaging of crime scene evidence. It is meant to assist everyone working in the field of evidence collection--from the first responding officer, to the newly assigned investigator, to the savvy veteran with many crime scene responses under his/her belt. The first responding officer may find himself/herself involved in a situation where he/she will need to collect a particular piece of evidence for whatever reason. In the beginning the crime scene trainee, regardless of their previous experience, can often times find that the job appears to be overwhelming. This is usually due to the abundant task and knowledge required to fulfill the duties of a crime scene investigator or evidence recovery technician. On the same pretext, the crafty veteran may find himself/herself assigned to do a task that he/she hasn't performed in a long time. As in any occupation if something is not done on a continuous basis, the basic knowledge need for completing that task may be temporarily forgotten. Hopefully this text will assist everyone in carrying out the task of crime scene evidence recovery and collection with ease.”