Take courses in photography. A crime scene photographer must understand how to take photographs under all conditions and in all types of light. While crime scene photography is not about fashion or highlighting an image, it is about providing clear details and sharp images.
Study criminal justice and forensic science. You can obtain an associate, bachelor's or master's degree in criminal justice online, or get a bachelor's in forensic science from many of these same schools. Multiple reputable online-focused universities and colleges provide criminal justice studies, including University of Phoenix (which offers classes either online or in-class at one of its 200 locations nationwide) and Kaplan University.
Take forensic photography classes. If you are already familiar with photography, a forensic photography class online can walk you through crime scene photography and help you hone the skills you need. Local community colleges offer online and offline classes that focus on forensic sciences, including psychology and photography.
Seek an internship. While online classes can provide you with a wealth of information and resources, crime scene photography and forensic sciences require hands-on experience as well. Internships with police departments and crime scene laboratories can help you put learned skills into practice.
Subscribe to forensic journals and trade magazines. Like all science, forensics is constantly evolving. Subscriptions to journals and trade magazines can help keep you apprised of the latest innovations and techniques.