Billy “Bill” Byassee, CCDI, CBE

Founder & Principal Investigator

Retired Federal Special Agent | Criminal Defense Investigator | Complex Investigations

Work With Me

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