Ken Yohe
Owner | Principal Investigator
JTF Investigative Services, LLCKen Yohe brings more than two decades of law enforcement and investigative experience to every case he handles. A graduate of Portland State University, Ken earned a four-year degree in Administration of Justice with a Minor in Sociology — a foundation that shaped both his analytical mindset and his deep understanding of how the criminal justice system operates from the inside out.
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Ken began his law enforcement career with the Multnomah County Sheriff’s Office in 1998 and served with distinction for 22 years, retiring in 2020. Over the course of his career, he worked in a wide range of assignments, ultimately spending the final 10 years as a Detective. During that time, he developed expertise in complex criminal investigations, surveillance operations, inter-agency collaboration, and advanced witness testimony — accumulating thousands of hours of specialized training along the way. He worked closely with virtually every law enforcement agency in the Portland Metro area, building professional relationships and investigative instincts that only come from years of real-world experience.
As a Detective, Ken was assigned to the East County Major Crimes Team — a multi-agency unit comprised of the Multnomah County Sheriff’s Office, Gresham Police Department, Oregon State Police, and a Senior Deputy District Attorney from the Multnomah County DA’s Office. The team was responsible for investigating homicides, serious assaults, and other high-profile crimes throughout the region. Ken served as the lead investigator on the Kyron Horman missing person case from 2016 to 2019, co-lead investigator on the Reynolds High School shooting, and co-lead on two separate officer-involved shooting investigations. He also assisted with numerous homicide investigations between 2010 and 2019 and served as the Cold Case Homicide Detective liaison with the cold case unit from 2015 to 2019.
In 2020, Ken founded JTF Investigative Services, channeling his law enforcement expertise into providing outstanding private investigative services. What began as a one-person operation has grown steadily over the past six years into a team of experienced investigators. JTF now operates across multiple states starting in the Pacific Northwest and expanding based on clients’ needs with the ability to work nationwide. The JTF team has completed hundreds of surveillance operations and thousands of recorded statements on behalf of clients ranging from private individuals and businesses to attorneys and insurance professionals.
Ken committed to providing every client with the same level of dedication, thoroughness, and integrity that defined his distinguished law enforcement career. If Ken is unable to assist with a particular matter, he will do his best to refer you to someone who can.
Ken Whattam
Operations Manager | Private Investigator
JTF Investigative Services, LLCKen retired as the most tenured member of the Portland Police Bureau’s Detective Division, capping a 30-year career that spanned fraud and white-collar crime, elder crimes, sexual assault, missing persons, kidnapping, assault, and homicide. He managed hundreds of complex cases as both a detective and a detective supervisor, including more than 500 death investigations, with a clearance rate 35% above the national average.
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His expertise extends to expert-level interview and interrogation, drafting and executing complex search warrants, and extensive courtroom testimony. As supervisor of the Homicide, Missing Persons, and Forensic Technology details, Ken reported directly to the Mayor’s and Chief’s offices, the Chief Deputy District Attorney, and the State Medical Examiner, giving him a rare combination of investigative depth and digital forensic insight.
Ken pairs thousands of hours of specialized training with complete professionalism, respect, and compassion for every client engagement.
Education Arizona State University · Certified, Oregon Department of Public Safety Standards & Training (DPSST)
Teaching & Presentations Oregon State Police Academy · Portland Police Detectives’ Academy · Regional (Multi-Agency) Detectives’ Academy · Oregon Homicide Investigators’ Association (OHIA) · Vidocq Society
Affiliations Portland Police Sergeants’ Academy · International Association of Police (IAP) · Fraternal Order of Police (FOP)
Sean Mallory
Operations Manager I Private Investigator
JTF Investigative Services, LLCSean Mallory has brought over 27 years of law enforcement experience to JTF Investigative Services LLC. After retiring as a Sergeant in 2019, Sean transitioned into the private sector and has spent the past four years building a reputation as a skilled and trusted private investigator.
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Over his career in law enforcement, Sean served in a wide range of specialized roles — including Detectives, the Fugitive Task Force assigned to the US Marshals, Internal Affairs, and the State HAZMAT Team, among others. Following his retirement, he served as a certified Law Enforcement Officer with the Cowlitz Tribe as a Public Safety Officer, where he also completed the Federal Academy on Policing on American Indian Reservations. That depth of real-world experience is what he brings to every case he takes on today.
Since stepping into private investigations, Sean has developed hands-on expertise across a broad range of case types, including surveillance, workplace investigations, hostile-termination cases, stalking, and missing-person cases. He approaches every case with the same professionalism and attention to detail that defined his law enforcement career.
Sean is licensed as a Private Investigator in Oregon and Washington, and he is committed to delivering thorough, reliable results for every client he serves.
Carrie Outhier Banks, PhD
Private Investigator
JTF Investigative Services, LLCDr. Carrie Outhier Banks has worked with survivors and offenders of domestic violence for over 3 decades as the Founder and Executive Director of Domestic Violence Safe Dialogue.
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She started working as a private investigator in 2022 with the continued desire to help people solve their problems.
Carrie brings to JTF Investigative Services LLC her unique skillset of proven interview and communication skills from the many years of working with victims of crime in dialogue situations as well as her experience in creating and giving expert testimony in cases of sexual and domestic assault. She handles the full range of professional investigative services for business and personal matters with the highest degree of professionalism and confidentiality.
Gary Muncy
Private Investigator
JTF Investigative Services, LLCGary Muncy joins JTF investigations after an extensive career in Law Enforcement as well as Uniformed Security Services. Gary served 32 years with the Multnomah County Sheriff’s Office retiring as a Sergeant in the Detective Unit. After retirement, he Managed a business unit, which provided uniformed security to both public and private sector entities. He possesses an excellent grasp of investigations and the management of a business unit.
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During Gary’s 32 years in Law Enforcement, he worked in Uniform Patrol, Narcotics, the East County Major Crimes unit as well as at the FBI Regional Drug Task Force. After retirement he worked for DePaul Industries finding employment for people with disabilities in the Security Sector in the State of Oregon. Most recently, Gary volunteered for 5 years as a Court Appointed Special Advocate (CASA) representing the interests of children in state custody, Multnomah County.
Chris Wheeler
Private Investigator
JTF Investigative Services, LLCWelcome to JTF Investigative Services, where trust meets experience. I am Chris Wheeler, a seasoned and highly skilled investigator with a career spanning three decades in law enforcement. My diverse background encompasses a wide range of specialties, including criminal, civil, and internal affairs investigations. I have a background in gang enforcement, tactical operations, the development of comprehensive training methodologies, policies, and procedures.
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I bring with me a wealth of experience garnered from my years as a member in gang enforcement and my involvement as a member of a tactical team. My journey through the realm of law enforcement has equipped me with invaluable insights into the intricacies of investigations, ranging from property crimes to homicide cases.
My proficiency extends beyond conventional investigative techniques. My commitment to precision and adherence to ethical standards has consistently delivered results, earning me a reputation as a trusted professional in the field.
Throughout my career, I have played a pivotal role in shaping the next generation of law enforcement professionals. As a trainer, I have worked to develop comprehensive training programs and policy creation that emphasize the latest investigative methodologies, tactical strategies, and ethical standards.
When you choose JTF Investigative Services, you are enlisting the services of a seasoned investigator with an unparalleled dedication to uncovering the truth. My commitment to excellence, coupled with a vast array of skills, positions me as the ideal choice for your investigative needs.
Whether you require assistance with private investigations or security consultations, I am here to provide a personalized and effective solution tailored to your unique circumstances.
Manny Hernandez
Private Investigator
JTF Investigative Services, LLCManuel “Manny” Hernandez is a licensed private investigator with JTF Investigative Services, leveraging his extensive law enforcement experience and fluency in Spanish to serve clients effectively. Manny joined JTF Investigative Services after retiring from a distinguished 27-year career with the Gresham Police Department.
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During his law enforcement career, Manny held a variety of roles, including patrol officer, DUII enforcement as a Drug Recognition Expert (DRE), gang enforcement, undercover narcotics operations, and detective work focused on person crimes. As a detective, he investigated a wide array of cases, such as property crimes, fraud, child abuse, and serious offenses including homicides, rapes, and assaults.
Manny also served as a lead detective on the Multnomah County Major Crimes Team, where he led or co-led investigations into critical incidents and conducted internal affairs inquiries. His Spanish language skills proved invaluable in assisting major investigations across the Portland metro area and neighboring jurisdictions. Additionally, he contributed to officer training as a certified defensive tactics and Police Vehicle Operations instructor.
Promoted to Sergeant, Manny supervised patrol officers and managed the Police Vehicle Operations unit and the department’s Cadet unit. He later transitioned back to investigations as a Detective Sergeant, overseeing the Persons Crimes division and coordinating the East County Major Crimes Team for over a decade. In this capacity, he collaborated with partner agencies and the District Attorney’s office to solve serious crimes in East Multnomah County.
Manny holds a bachelor’s degree in criminal justice/law enforcement studies, with a minor in Spanish from Western Oregon University. A devoted family man, Manny is proud to share his life with his beautiful wife and three daughters.
Michele Hughes
Private Investigator
JTF Investigative Services, LLCMichele joins the JTF Investigative Services family after a 25 year career in law enforcement. She brings a wealth of knowledge and her ability to handle complex cases with integrity and professionalism make her a great addition. During her time with the Portland Police Bureau she worked Patrol, Gang Enforcement, Metro Gang Task Force, and School Police. After promoting to sergeant she supervised Patrol and spent a decade as a Detective Supervisor focusing on person crimes.
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Michele has supervised hundreds of death investigations, homicide investigations, and officer-involved uses of force. Michele routinely briefed the Mayor and Chiefs office and worked directly with the District Attorney’s office as well as the Medical Examiners office. In addition to supervising Homicide, she supervised the Missing Persons Detail, triaging thousands of Missing Person calls.
Michele was dedicated and committed to getting closure and resolution to the victim’s families and she brings that level of dedication and commitment to the JTF Investigative Services team. She is licensed in both Oregon and soon to be Arizona to help you with all your investigative needs.
Paul Dolbey
Private Investigator
JTF Investigative Services, LLCPaul joins the JTF Investigative Services family after a 24-year career in law enforcement and 10 years with the United States Air Force.
With his combined 34-years of law enforcement knowledge, Paul brings investigative experience specializing in complex criminal investigations, internal affairs investigations, officer-involved incidents, and professional background investigations.
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During his 16-years as a Portland Police Bureau (PPB) Detective, Paul conducted investigations involving homicide, assault, sexual assault, and allegations of misconduct involving sworn and non-sworn personnel. His work required the careful examination of evidence, detailed witness interviews, and the preparation of comprehensive investigative reports relied upon by command staff and municipal leadership.
Paul has authored thousands of pages of investigative reports and warrants and has also testified in federal, county, and civil court proceedings. Paul served as the lead Bias Crimes Investigator for the PPB and regularly briefed executive leadership and city officials on sensitive investigative matters, including use-of-force incidents.
In addition to investigative work, Paul served as Lead Defensive Tactics Instructor, for the PPB, training more than 200 officers in use-of-force policy, defensive tactics, patrol tactics, and firearms tactics. He was also selected for the position of Public Affairs Officer for the PPB and is well versed in public speaking and press relations.
Paul earned his BS Degree in Criminal Justice and now provides independent investigative services, internal investigations, and professional background investigations for JTF Investigative Services.