One Logic Source, LLC
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Our Team

Justin Vincent / Co-Owner

Justin Vincent is the co-owner of One Logic Source and an experienced investigator with a background spanning criminal defense, civil investigations, intelligence analysis, and trial support. He holds a B.A. in Sociology/Criminology from the University of Kentucky and an M.A. in Intelligence & Global Security from Point Park University. 


Justin has built his career around uncovering facts, analyzing complex situations, and helping clients navigate high-stakes matters. Through One Logic Source, he has provided investigative services in capital and major felony cases, civil matters, Title IX complaints, surveillance assignments, social media investigations, and trial preparation, including jury research, jury selection analysis, witness management, and evidence organization. His work has consistently required sound judgment, attention to detail, and the ability to communicate clear findings in sensitive and challenging environments. 


Throughout his career, Justin has had the privilege of working on cases that have had lasting impacts on many lives. His Christian faith is the foundation of his work, driving him to pursue truth, justice, and compassion in everything he does. This mission fuels his passion to serve others.

Laura Gallardo-Chandler / Co-Owner

Laura Gallardo-Chandler is an accomplished criminal defense investigator with extensive experience across multiple areas of the criminal justice system. Born and raised in South Texas. As Co-Owner and Criminal Defense Investigator at One Logic Source, LLC, she provides critical support to attorneys by analyzing discovery, coordinating witnesses, managing case documents, and conducting in-depth investigations.


Previously, Laura served as an Investigator for the Federal Public Defender's Office in Tennessee and Texas, playing a vital role in defending indigent clients facing federal charges. Her background also includes case management at a residential facility and child protective investigations, showcasing her ability to handle sensitive cases with diligence and compassion.


Laura holds a Bachelor’s degree in Criminal Justice from Texas A&M International University, is fluent in Spanish, and is recognized for her meticulous attention to detail, cultural competence, and unwavering commitment to justice.

Darius Hankins / Investigator

Darius Hankins is a seasoned Senior Investigator and former Narcotics Detective with over 16 years of specialized experience in law enforcement, covert operations, and criminal case management. He has led high-risk investigations involving homicide, arson, narcotics, and digital forensics, working closely with legal teams, expert witnesses, and law enforcement agencies. 


Known for his integrity, attention to detail, and strategic problem-solving, Darius is highly skilled in surveillance, forensics, data analysis, and crisis management.


Darius also brings entrepreneurial experience as a business owner and proven leader dedicated to protecting communities and citizens rights, while mentoring the next generation of investigators.

April Merkel / Administrative Assistant

April Merkel serves as the Administrative Assistant at One Logic Source, where she brings a strong foundation in organization, client support, scheduling, data entry, and workflow management. With experience in structured, high-responsibility environments, April is known for her steady, detail-oriented approach and her ability to help keep operations running efficiently. 


April is currently pursuing a degree in Social Science and Human Services through the Kentucky Community & Technical College System, with plans to continue her education at Eastern Kentucky University in the Bachelor of Social Work program. Her academic background, combined with hands-on experience in court observation, clerical support, case coordination, and collaboration with service providers, has helped her develop a professional, ethical, and trauma-informed approach to her work. 


In addition to her administrative strengths, April has experience supporting professionals in legal and advocacy-related settings, including assisting with clerical work, data gathering, appointment coordination, and documentation. She also has a background in social media management and customer support, giving her a versatile skill set that supports both internal operations and client-facing needs. 


Frequently Asked Questions

One Logic Source, LLC handles a wide range of criminal cases, including but not limited to murder, drug crimes, DUIs, domestic violence, theft, assault, and sex crimes.


We also investigate civil matters including wrongful death, general disputes, malpractice defense and more.


One Logic Source can provide you with a strong defense strategy by investigating your case, gathering evidence, analyzing case documents and supporting your defense team. We will work tirelessly to ensure that your rights are protected and that you receive the best possible outcome.


One Logic Source is dedicated to providing personalized and compassionate investigation services to each of our clients. We understand that facing criminal charges can be stressful and overwhelming, and we are committed to guiding you through the investigation process with empathy and professionalism. We pride ourselves in being the gold standard in this field and  your ONE LOGIC SOURCE for all things investigation. 


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