Since 1991, McMahon & Associates has been conveniently located in Ft. Lauderdale, Florida. We have no geographical limitations.

Rory McMahon

Rory J. McMahon

Between 1978 and 1991, Rory J. McMahon was a Federal Probation officer in the Southern Districts of New York and Florida.  During his career, he investigated and supervised numerous career criminals, including major white collar and fraud specialists, large scale narcotics traffickers, and organized crime members and associates.   This experience enabled him to become proficient in many areas of investigation, including financial, surveillance, undercover procedures and working with substance abusers.

Between 1990 and 1998, Rory was an Instructor and Department Chair of the Private Investigative Services Program at City College, a private accredited Junior College in Ft. Lauderdale.  In that capacity, he authored seven books on investigations, which have been used in the program.   In February, 2001 CRC Press published his latest book - Practical Handbook for Private Investigators.  See the book pages on this site for more information on that book.

From 1991 to the present, Rory J. McMahon has been the President of R.J. McMahon and Associates, Inc. Although this is a full service detective agency, Rory specializes in criminal, civil and background investigations.   He was a founding father of the Florida Association of Licensed Investigators.  He is the former Southeast Region Director for the National Association of Legal Investigators (NALI).   In 1997, he passed the rigid requirements to become certified as a Legal Investigator.  In 1999, he became a Florida Certified Investigator through the FALI.  In January, 2000 Rory was recognized as a Board Certified Criminal Defense Investigator by the Criminal Defense Investigation Training Council.  He was also named to their Board of Directors.  Presently, Rory is undergoing training and certification in Computer Forensics.

In June, 2005 Rory, after one year of diligent study, passed the difficult examination for Certification as a Fraud Examiner (CFE); and was so designated by the Association of Certified Fraud Examiners.   This new certification further enhances his credentials and standing as one of the premier fraud investigators in the world.

Richard Harris

Richard Harris served in the Public Safety field for over 17 years.  He worked in several areas of the Police and Fire Service including Chief of Department.  He has been in the Private Investigation field both in a part time and full time status for over 16 years.   He has authored "Marketing Checklist for the Private Sector", "Red Flags of the Fire Fraud" and "Expert Testimony and the changing Case Laws".  He has a BS in Fire Safety Management.  He has

Richard Harris

served on many National and State Committees in the areas of Investigation and has taught at Colleges and Universities throughout the United States on topics relating to Fire, Police and Private Investigations.   He also lectures Internationally on topics relating to Insurance Investigations, Fire Investigations, Expert Testimony and Case Laws.  He is an Expert Witness in various areas related to Criminal and Civil Court Cases.  He is a Licensed Private Investigator in Michigan and Florida, a Certified Fire & Explosion Investigator (CFEI), Certified Fire Investigator Instructor (CFII), Certified Fraud Consultant (CFC) and a Florida Certified Investigator (FCI).  He currently conducts investigations throughout the United States and the Caribbean in cases related to Insurance Fraud, Fire, Burglary, Theft, Workers Compensation and Surveillance Investigations.  He has investigated over 5,000 fire related cases involving large and small losses in Industrial, Commercial, Residential, Motor Vehicle, Marine Craft, Mobile Homes and Machinery.

Larry Longnecker

Larry Longenecker has over 29 Years of Police & Fire Service in the Kalamazoo, Michigan area.  He has extensive training and experience in Fire Origin & Cause Investigations of Commercial, Industrial, Residential and Motor Vehicles Fires.  He has extensive training in Fire Origin & Cause Investigation as well as coordination of Fire Investigation Training Classes.  He also has a major background in Police Procedures & Tactics as well as Security Service & Guard Consulting.

Gary Dreyer
Gary Dreyer has served in the fire service for over 15 years.  He has served in all areas of the fire service including Fire Marshal, Fire Inspector and Chief of Department.  Gary has an Associates degree in Fire Science and is completing his BS in Fire Administration.  He has extensive hours of education and experience in Fire Investigation, Fire Behavior and Fire Inspection investigation in the States of Michigan & Missouri, and through training at the National Fire Academy and Western Illinois University.   He has also been a respected instructor in the fire service for over ten years teaching in the areas of fire investigation and inspection as well as fire fighting tactics.  He is certified through the National Fire Protection Association (NFPA) as a Fire Inspector (NFPACFI1).

Douglas K. Haas
Douglas K. Haas, Retired Captain, Fort Lauderdale Police Department; Former Director of the Metropolitan Organized Crime Intelligence Unit (federal, state and local police agency task force on organized crime and terrorism).


The firm also has several Forensic & Surveillance specialists on staff strategically located around the state to better service our clients.


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