Billy “Bill” Byassee, CCDI, CBE
Founder & Principal Investigator
Retired Federal Special Agent | Criminal Defense Investigator | Complex Investigations
Professional Overview
Need experienced investigative leadership on a serious matter?
Contact Principled Investigations Group to discuss your case confidentially with Billy Byassee and the firm’s investigative leadership team.
Bill “Billy” Byassee is the Founder and Principal Investigator of Principled Investigations Group. With a background in federal law enforcement, criminal investigations, fraud matters, and complex case development, Billy leads the firm’s investigative direction and ensures each matter is handled with discipline, discretion, and defensible documentation.
Billy’s experience includes serious criminal matters, financial investigations, federal case work, fraud-related inquiries, and litigation-focused investigative support. His approach is built around clear facts, reliable documentation, and investigative work that can withstand scrutiny from attorneys, courts, businesses, and decision-makers.
As Principal Investigator, Billy oversees case strategy, investigative standards, client relationships, and the firm’s overall commitment to truth, integrity, and tenacity.
Areas of Focus
Criminal defense investigations
Federal and complex investigations
Fraud and financial crime matters
Civil litigation support
Case strategy and investigative planning
Attorney and client advisory support
Experience & Credentials
Founder and Principal Investigator of Principled Investigations Group
Retired Federal Special Agent
Defense Criminal Investigative Service experience
Former Army CID experience
Criminal defense investigator
Experience in fraud, financial crime, and complex fact-finding matters