Final answer:
The collaboration between a sociologist and a geneticist to explain violent criminal behavior likely resulted in an Integrated theory, which combines elements from different scientific disciplines to provide a comprehensive understanding of crime.
Step-by-step explanation:
Dr. Johns, a sociologist, and Dr. Gilmer, a geneticist, having developed a theory that incorporates elements from both sociology and genetics to explain violent criminal behavior, have most likely developed a(n) Integrated theory. Integrated theories of crime consider multiple perspectives and interdisciplinary research to understand complex phenomena such as criminality, combining insights from different disciplines, including sociology, psychology, genetics, and others.