Practitioner Consultant Members

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Barry A. J. Fisher

B.S. The City College of New York

M.S. Purdue University

MBA California State University, Northridge


Barry Fisher served as the Crime Laboratory Director for the Los Angeles County Sheriff's Department from 1987 until his retirement in 2009. He began his career in criminalistics at the crime lab in 1969 and worked in a wide variety of forensic science assignments. In addition to forensic science, he is interested in the interrelationship between forensic science and the law.

Fisher is a Distinguished Fellow and past-president of the American Academy of Forensic Sciences. He served as president of the International Association of Forensic Sciences, and president of the American Society of Crime Laboratory Directors.

He has been a member of several editorial boards:  the Journal of Forensic Sciences, the Journal of Forensic Identification, Forensic Science Policy and Management and the McGraw-Hill Encyclopedia of Science and Technology.

His textbook, Techniques of Crime Scene Investigation, in its 8th edition, enjoys wide popularity.  He is a co-author of two other books, Forensics Demystified and Introduction to Criminalistics: The Foundation of Forensic Science.

Since retiring, Fisher has consulted for the United Nations Office on Drugs and Crime, the United States Department of Justice, International Criminal Investigative Training Program (ICITAP), Analytic Services Inc., a not-for-profit institute that provides studies and analyses to aid decision-makers in national security, homeland security, and public safety and RTI, International Center for Forensic Science.

Barry and his wife Susan make their home in Indio near Palm Springs, California. 

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Colleen Friend, Director, Child Abuse and Family Violence Institute

Colleen Friend, PhD, LCSW, teaches at CSULA, where she is the Director of the Child Abuse and Family Violence Institute and the Partnership between CSULA and the Los Angeles County Juvenile Court.  She teaches two of the required classes for the CSULA Child Maltreatment and Family Violence Certificate.   Her practice experience and research publications are in child welfare training, intimate partner violence, risk assessment, adolescent relational aggression after multidisciplinary teams and child sexual abuse interviewing.  She has been a trainer for the LA County Department of Children and Family Services' new worker academy and  she was part of the invited team for training their workforce on “Engaging to Meet the Mental Health Needs of Children and Families,” as part of the Katie A. legal settlement. 

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Director, Los Angeles County Sheriff’s Department


Wesley P. Grose has been with the County of Los Angeles since 1984, and with the Los Angeles Sheriff’s Department since 1994.  Wesley has served as the Scientific Services Bureau (Crime Lab) Director for the Sheriff’s Department since 2015.  His career began with the Department in 1994 as a Forensic Document Examiner after spending eight years with the Los Angeles District Attorney’s Office in their Bureau of Investigation as a Forensic Document Examiner, and two years with the Los Angeles Auditor-Controller’s Office in the Warrant Investigation Section as a Document Examiner. He was promoted to Supervising Criminalist in 2002, where he oversaw the Latent Prints/Crime Scene Investigation Section. In 2006 he was promoted to Assistant Director, where he oversaw the Operations of the Bureau and Questioned Documents, the Photo/Digital Unit, Controlled Substances, Toxicology, Forensic Alcohol, Polygraph, and Information Technology. He has a Bachelor of Arts Degree in Biology, and Master of Forensic Sciences Degree.  He has served on various Boards and Commissions, including serving as the President of the California Association of Crime Laboratory Directors, and the President of the Southwestern Association of Forensic Document Examiners. He has authored and co-authored multiple technical papers, and spoken at a variety of professional conferences including the American Academy of Forensic Sciences.  He served as a member of the Executive Office of the President, National Science and Technology Council, Committee on Science, Subcommittee on Forensic Science, Standards, Practices and Protocols Interagency Working Group, and is currently a member of the National Institute of Standards and Technology’s Expert Working Group on Human Factors in Handwriting Examinations. He earned a Master of Forensic Science degree at the George Washington University, a Bachelor of Arts in Biology degree from the California State University, Northridge, and an Associate in Arts degree from Los Angeles Pierce College

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Bruce Houlihan, Director, Orange County Crime Laboratory

Bruce Houlihan is Director of the Orange County Crime Laboratory in southern California, one of the leading forensic laboratories in the United States. The OC Crime Lab (OCCL) serves over 35 cities and organizations, with approximately 140 specialists, scientists, technical and support staff in the full-service forensic laboratory. The OCCL forensic lab achievements include: accreditation in 1992, the first ISO/IEC 17025 accreditation in California, one of the first breath alcohol calibration accreditations in the country, advancing the implementation of mature DNA batching systems, implementing a leading driving under the influence of drugs program, and other integrated forensic database programs, including biometrics and firearms. Bruce studied chemistry and physics as an undergraduate, and attended graduate school at the University of California of Irvine (chemistry) and Vanguard University (leadership).  He has worked at the OC Crime Laboratory for 28 years as a forensic scientist, and also teaches at Vanguard University part-time as an adjunct professor of chemistry and physics. Mr. Houlihan’s career involved most areas relating to forensic chemistry, and he was involved in many research projects regarding DNA population studies and applications to forensic DNA. Additionally, Mr. Houlihan has extensive experience in information systems, LIMS, and managing forensic scientific data. Mr. Houlihan has served as laboratory director since 2009, has over 10 years of service in crime laboratory leadership, participates in national dialogs regarding efficiency and crime laboratory casework norms, is serving on the NIST/OSAC Quality Infrastructure Committee, and serves on the board of the California Association of Crime Laboratory Directors (including as past president), along with other memberships, participations, and presentations in national forensic organizations.



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Deputy District Attorney Marguerite Rizzo

Los Angeles County District Attorney’s Office

Forensic Science Section


Marguerite Rizzo is currently assigned as the Deputy-In-Charge of the Forensic Science Section at the Los Angeles County District Attorney’s Office.  Rizzo has been a Deputy District Attorney since 1999 and has been assigned to a number of branch offices throughout Los Angeles County.  Before being promoted to the DIC of the Forensic Science Section, Rizzo was also assigned to two special trial units, the Family Violence Division and the Elder Abuse section.