Carl Makres was employed by the Dallas Police Department (DPD) on December 4, 1968, after earning a Bachelor of Science degree in mathematics from the University of Arizona. Mr. Makres served as a crime analyst for over 15 years providing police officers, detectives, administrators, lawyers, reporters, and the public with offense statistics, crime trend analyses, specific site crime forecasts for tactical deployment, and investigative leads for unsolved cases. He has testified as an expert witness in court many times relative to the crime related data and analyses he provided to law firms or private investigators.

He also served as an operations research analyst for 13 years providing police workload and staffing analyses, budget and personnel hiring forecasts, patrol car beat designs and information need assessments for various divisions of the DPD. In this capacity, he served as the supervisor of the Special Projects Unit for the department. He authored several grant applications and Requests for Proposals for automated information and resource allocation systems and oversaw their implementation. In 1988, he established the Computer Support Unit for hardware and software procurement and application development. After a long career spanning almost 29 years, he retired from the police department in October 1997.

His many honors while with the DPD included several Certificates of Merit, the Civilian Employee of the Year award, and cash awards for outstanding service. He has coauthored a manual on crime analysis, CASS: Crime Analysis System Support, published by the Justice Department for the International Association of Chiefs of Police (IACP) as well as several articles for law enforcement related journals (Police Chief Magazine, symposium journals, etc.). He also contributed a chapter on geographic crime analysis to the textbook, Crime: A Spatial Perspective, published by Columbia University Press and edited by Dr. Daniel E. Georges, State University of New York, and Dr. Kieth Harries, Oklahoma State University. Mr. Makres has also worked as a consultant for the IACP evaluating crime analysis units across the country as well as lecturing on crime analysis topics to police administrators and analysts.

After retirement, Mr. Makres did Internet consultant work for Mr. Billy Don Prince former Chief of Police of the Dallas Police Department.