WHO I AM
My name is Nathan Moeller. I founded Semper Fi P.I. after serving as a United States Marine and working in law enforcement. I’ve seen the justice system from multiple perspectives, and I know how easily people can be reduced to labels, assumptions, or incomplete narratives. My mission is simple: investigate thoroughly, think critically, and ensure the truth is never overlooked.
EXPERIENCE
United States Marine - Former Law Enforcement - Criminal Defense Investigator
MISSION
To uncover truth, safeguard due process, and ensure fairness for every individual.
VALUES
Honor · Courage · Commitment
WHAT I DO
Criminal Defense
Investigation
Independent investigation services to support defense attorneys and clients.
Case reconstruction, evidence analysis, and locating overlooked information
critical to due process.
Witness & Evidence
Development
Detailed witness interviews, statements, and timeline clarification.
Identification of new witnesses and verification of existing accounts.
Case Review &
Strategy Support
Comprehensive review of discovery, investigative gaps, and case materials.
Consulting with attorneys to develop investigative strategies.
WHY CHOOSE ME
INTEGRITY
I believe every case and every person deserves honesty, respect, and truth. My work is guided by fairness, ethics, and a commitment to doing what is right.
EXPERIENCE
With my background I understand the justice system
from multiple angles and know how to navigate its complexities.
COMMITMENT
I approach every case with discipline, determination, and a
service-over-self mindset. My mission is to uncover facts,
protect due process, and serve everyone equally.