About Our FRPEA Polygraph Team

Warren W. Ferland

Warren W. Ferland earned his Bachelor’s Degree in Criminal Justice with a minor in psychology from Husson University. Warren began his law enforcement career with the Hull, Massachusetts Police Department, and was later hired as a Maine State Trooper. He retired from the Maine State Police in 2014.

Warren was promoted to polygraph examiner and was assigned to the Maine State Police Polygraph Unit for 14 years. He worked as a supervisor for 10 years during that time. Part of his duties with the Maine State Police required him to intern new polygraph examiners and review their work for polygraph licensing with the Commissioner of the Maine Department of Public Safety.

Warren was trained in polygraph at the Royal Canadian Mounted Police Canadian Police College in 2001. He has conducted thousands of interviews and has extensive polygraph and investigatory experience solving the most heinous crimes including murder and sex crimes. He as well as extensive experience in conducting polygraph examinations in internal affairs investigations, pre-employment polygraph screenings, and post-conviction sex offender tests.

Michael P. Ranhoff

Michael P. Ranhoff earned a Bachelor’s Degree in Psychology from Providence College in 1975. He began his law enforcement career in 1980 when he joined the Arizona Highway Patrol.

He later joined the New Hampshire State Police and retired as a Detective Sergeant from their Major Crimes Polygraph Unit. Michael graduated from the Texas Department of Public Safety Law Enforcement Polygraph School in 1998. He has completed the basic and advanced PCSOT polygraph schools modeled after the Oregon and Colorado models.

Michael has administered thousands of diagnostic, pre-employment, internal affairs, and post-conviction sex offender polygraph examinations. He has advanced training in interview techniques, interrogation, statement analysis and has instructed at the New Hampshire Police Academy. Michael was also chosen by the office of Maine’s Commissioner of Public Safety to help draft the current Maine Polygraph Law MRSA Title 32 Chapter 86 § 7351.

Dale Keegan

Dale Keegan earned a Bachelor Degree in Criminal Justice from Northeastern University in Boston, Massachusetts in 1984.  He began his Law Enforcement career in 1986 with the Maine State Police working in the Major Crimes Unit for the majority of his career including eleven years in their Polygraph Unit. Upon retirement from the Maine State Police in 2011, he served for 13 years with local police agencies before fully retiring from Law Enforcement in 2024.

Polygraph Examiner Dale Keegan received his initial polygraph training at the Royal Canadian Mounted Police Polygraph School in Ottawa, Ontario Canada. By use of polygraph, Dale has solved countless criminal investigations ranging from thefts to murders. He earned a Maine State Police Colonel’s Award for his confirmed polygraph accuracy rates. Much of his forensic polygraph work has revolved around child abuse and sexual assaults.

He has a lot of experience administering pre-employment polygraph screening examinations on law enforcement applicants. Dale also brings with him specialized interview techniques and statement analysis skills. He has also taught interview and interrogation techniques to fellow law enforcement officers.

Dale is trained and certified to administer Post-Conviction Sex Offender Treatment and Monitoring examinations. He has polygraph examiner professional licenses in Maine and Vermont. Ferland, Ranhoff & Polygraph Examiner Associates are honored to have Dale as a member of our team.