Trial / Jury Expert Witnesses

Dr. Heather L. Manning is recognized Forensic Criminologist and Subject Matter Expert specializing in violent crime, sexual exploitation, domestic violence, and human trafficking. With nearly two decades of experience spanning academia, clinical practice, child welfare, corrections, and law enforcement collaboration, Dr. Manning brings a rare interdisciplinary perspective to the analysis, investigation, and prevention of complex criminal behavior.

Dr. Manning holds a Ph.D. in Forensic Psychology and has extensive expertise in criminal profiling, behavioral analysis, forensic interviewing, and trauma-informed investigative practices. She currently serves as a Professor and Subject Matter Expert at Evidentia University, where she teaches graduate-level courses in criminal profiling, psychological profiling, and behavioral analysis grounded in FBI-aligned methodologies. Her academic work emphasizes offender typologies, victimology, and the behavioral dynamics of violent and sexually motivated crimes. She also works as a cold case investigator and a research IRB board member.

Litigation Support - Providing expert witness consultation and testimony in legal proceedings. Services include case review and expert opinion development, written expert reports, deposition preparation and testimony, trial testimony, and consultation on behavioral evidence, offender dynamics, victim behavior, and trauma impact.

Areas of Expertise

An active scholar and author, Dr. Manning’s research and publications focus on sexual violence, offender behavior, trauma, and systemic failures in protection and response. Her work includes peer-reviewed research, professional conference presentations, and authored books addressing serial violence and survivor experiences.

Dr. Manning is a member of the American Institute for the Advancement of Forensic Sciences, and the Society for Police and Criminal Psychology. She is widely respected for her ability to bridge clinical insight, academic rigor, and real-world investigative application—advancing justice, victim-centered practice, and professional excellence across forensic and behavioral disciplines.

View Heather Manning's Consulting Profile.

Steven Gaskell, Psy.D. is a Forensic Psychologist, license eligible in all 50 states, and licened in Illinois, Georgia, Florida, and Kansas. He has years of extensive experience providing a variety of Forensic Psychological Evaluations and testifying regarding a variety of legal issues. Dr. Gaskell has completed more than 2000 Forensic Psychological Assessments including over 1000 pre-trial Competency to Stand Trial or Fitness to Stand Trial and Criminal Responsibility (Insanity Defense) psychological evaluations and he has provided expert testimony these issues on numerous occasions. Competency to Stand Trial/ Fitness to Stand Trial Criminal Responsibility or Sanity at the Time of the Offense Mitigating Factors Assessment Miranda Rights Issues (voluntariness, competency to confess, interrogative suggestibility) Malingering and Deception Sexual Assault Allegations Sex Offender Evaluations Sexually Violent Person Evaluations Pedophilia Paraphilias Future Likelihood of Sexual Re-Offense

Linnda Durre', Ph.D., Licensed Psychotherapist, (FL License #MH6058) is an expert witness, psychotherapist, family counselor, intern supervisor, international speaker, corporate trainer, author, business consultant, adjunct college professor, and a magazine, Internet, and newspaper columnist. Her four areas of court expertise are Family Law, Personal Injury Law, Employment Law, and Criminal Law. 

Litigation Support: With over 49 years of experience, she consults to attorneys and has been qualified as an expert witness in 12 states - NY, CA, FL, AL, CT, AR, AZ, TN, WA, IA, OH, GA - in the areas of Personal Injury, PTSD, Family and Couples Counseling, Divorce, Child Custody, Relocation, Drug and Alcohol Counseling, Sexual Harassment, Sexual Abuse by Psychotherapists, as well as Age, Race, Gender, and Sexual Orientation Discrimination. Her 400-page doctoral dissertation and research in the latter area was cited to pass legislation in several states. 

Dr. Durre' has hosted and produced four radio shows, two of which were call-in advice shows - "The Dr. Linnda Durre' Show" on WDBO in Orlando (a Cox station) and "Let's Talk with Dr. Linnda Durre' on an NPR station in New York, and two radio interview shows. Her last show was a daily hour-long podcast, entitled, "Linnda Durre' Interviews" Dr. Linnda Durre' has hosted and produced two call-in advice TV shows, including being selected in a national search of 200 applicants, to host, "Ask The Family Therapist," on America's Health Network (AHN), which was associated with Mayo Clinic and each show aired daily for two hours from Universal Studios Orlando. She was vetted by Mayo Clinic and America's Health Network.

She has appeared on Oprah, 60 Minutes, O'Reilly (twice), Today Show, Good Morning America, Canada AM, Daytime, Donahue (twice), Sally Jessy Raphael, People Are Talking, Home Show, Hour Magazine, Home and Family Show, Disney Channel, and the local and/or national news on NPR, PBS, CBS, ABC, NBC, CW, and Fox.

Dr. Durre' has been interviewed, cited, and/or quoted by the NY Times, LA Times, Forbes, WSJ, IBD, Business Week, SF Chronicle & Examiner, Toronto Globe & Mail, Albany Times Union, Atlanta Journal Constitution, Orlando Business Journal, Orlando Sentinel, Parade Magazine, Alternative Medicine Magazine, CNN Online, Washington Parent Magazine, Screen Actor Magazine, Florida Magazine, Pasadena Star News, Orlando Magazine, Women's Health Magazine, and others.

View Linnda Durre's Consulting Profile.