Forensic Profiling / Identification Expert Witnesses: 4

Michael Corbett, CFE, CEDS, CAMS, PI, is an Investigations and Compliance Professional with 35 years of leadership in the conduct, management, and oversight of complex investigations. After more than thirty years with the U.S. Drug Enforcement Administration (DEA) Mr. Corbett offers extensive experience in all phases of investigations to include development of investigative leads; witness identification and interviews; development and management of informants; evidence collection and analysis; operational planning, trial preparation and testimony. He has extensive experience in leading multi-agency, multi-jurisdictional investigations as well as policies, procedures and programs impacting operations.

Mr. Corbett has proven expertise in sensitive international operations requiring close coordination with foreign government officials and agencies and is experienced in working within the diplomatic and consular communities as well as with private sector interests abroad. Experienced in the detection, investigation and mitigation of official corruption.

Areas of Expertise:

Education, Certifications, and Licenses:
Bachelor of Science, Criminal Justice Administration, University of Central Missouri
Certified Fraud Examiner (CFE)
Certified E-Discovery Specialist (CEDS)
Certified Anti-Money Laundering Specialist (CAMS)
Licensed Private Investigator, Owner/Manager of a licensed Texas Investigations Company (State License A04186901)

David H. Williams is an internationally-known expert in the Wireless / Mobile Location field and President and Founder of E911-LBS Consulting.

Litigation Support - Mr. Williams provides the highest quality and most impactful expert witness services related to wireless location, across the full range of IP / Patent, criminal, and civil case dimensions from the most technical to those regarding business methods. His services include forensic analysis, reports, and testimony on the validity and accuracy of various types of cell phone/sensor location surveillance devices and associated tracking using GPS, Call Detail Records(CDRs), Cellebrite data extraction, and other location data sources. He is an expert in determining how social media and other mobile application usage can play a key part in various cases.

Mr. Williams has successfully provided expert witness services in over 150 patent, civil, criminal, anti-trust, and ITC cases, including several successful Inter Parte Reexaminations (IPRs), and over 40 civil, criminal, and law enforcement administrative proceedings. His credentials in wireless location prior art go as far back as the early 1980s. He has been deposed 24 times and testified 8 times, including winning in the International Trade Commission (ITC) Court as well as in the Eastern District of Texas, winning both IPR and infringement cases. His work with both prosecution and defendants have resulted in numerous key wins/favorable outcomes, with over a dozen wins (against only a few losses) as well advantageous settlements/pleadings. His experience is differentiated based not only the amount of experience but its type, having worked "on-the-inside" of various carriers, infrastructure providers, and location-service application developers. This enables knowing the right questions to ask of such providers, and to "break through the wall" that such providers often put up in litigation.

The basis of Mr. Williams' expertise is his 35+ years in mobile/wireless communications and information technology solutions design, implementation and ongoing management, Mr. Williams has extensive experience in the activities and issues needed to get mobile location applications to market, including design at the application, system, interface / integration, network, IT, operational and customer facing levels. Mr. Williams has extensive expertise in all aspects of LBS delivery across the mobile location ecosystem including enabling network communications, location technologies / sensors, map data, geospatial platform / GIS, GPS and other location chipsets, location data management, and device, infrastructure, and integration providers. David Williams has developed and implemented industry-leading product and technology strategies and solutions for numerous LBS applications and markets and provides consulting and research services to some of the leading carriers and enterprises in the U.S., Asia, and Europe. His client list includes Apple, AT&T, FedEx, GE, GM, GMG, Google, The Houston Police Department, The Los Angeles District Attorney's Office, Lyft, Overhead Door, Qualcomm, Samsung, Sprint, Toyota, Verizon Wireless, Zillow, and numerous medium, small, and startup companies, plus numerous law firms of all sizes. He also provides support to various State Public Defenders Offices on a partial pro-bono basis. 

Areas of Expertise:

View David Williams' Consulting Profile.

Dr. Michael J. Perrotti, Ph.D., a member of the National Academy of Neuropsychology, specializes in Clinical and Forensic Psychology. He has over 30 years of experience with consumers, courts, and counsel including civil, prosecution, defense counsel, family court and the US Government. Dr. Perrotti contributes to the profession as an Expert Consultant for the State of California Board of Psychology, and the California Board of Behavioral Science Examiners and is certified by LA County System Court as an Expert Witness in Neuropsychology, eyewitness ID and false confession.

Dr. Perrotti was an Assistant Professor of Psychiatry & Behavioral Science at the Keck School of Medicine, USC (2005-2006), and conducted complex neuropsychological evaluations in USC. Dr. Perrotti possesses specialized training and has clinical and research interns. His practice is an approved internship site at UCLA. He also has expertise in the area of Assessment of Sexual Deviation and Evaluation of Child Sexual Abuse Allegations. His training, experience, and use of the Abel Assessment of Sexual Interest Computerized Test from the Abel Center in Atlanta, Georgia, enables him to add a state-of-the-art sophisticated tool for the evaluation of sexual offending. Dr. Perrotti has served as an expert witness for plaintiff and defense in personal injury and employment and workplace matters. Dr. Perrotti was awarded the Volunteer Services Award from the President's Volunteer Council as Service and Civic Participation, the White House. Dr. Perrotti is a member of the Orange County Sheriff's Reserve, Professional Services Division.

Services Include:

• Neuropsycholgical Assessment
• Sanity / Competency to Stand Trial Assessment
• Police Misconduct
• Suggestibility and False Confession
• Crime Scene Investigation in Report Formulation
• Sexual Predator Determination
• Effects of Psychotropic Medications on Confession
• Expert Neuropsychologist in Sexual Assault Trial
• Expert in Bonding Studies and False Confessions
• PTSD (acute and complex) in General, Law Enforcement, and Iraq War Veterans
• Panic Disorders and Phobias
• Custody Evaluation
• Severe Trauma in Children, Adolescents, and Adults

George Schiro is a DNA Technical Leader - Forensic Scientist. His duties include incorporating the DNA Advisory Board (DAB) standards, accountability for the technical operations of the lab, conducting DNA analysis using the 13 STR core loci and Y STR in casework, DNA research, forensic science training and crime scene investigation.

Mr. Schiro has worked over 3500 cases and has qualified as an expert over 175 times in 31 Louisiana parish courts, Arkansas, California, Florida, Mississippi, Missouri, Nevada, New York, Texas, West Virginia, federal court, U.S. court-martial, and two Louisiana city courts. Has also consulted on cases in 29 states.

Qualified as an Expert in the Following Areas: