ASIS International (ASIS) Professional Certified Investigator Practice Exam

Alec Jeffreys developed and invented DNA fingerprinting, a groundbreaking technique that revolutionized forensic science and genetics. In 1984, while working at the University of Leicester, Jeffreys discovered that certain patterns in DNA could be used to identify individuals uniquely. This technique relies on the variability of specific regions of DNA, making it possible to distinguish between the genetic profiles of different individuals.

Jeffreys' work laid the foundation for applications in criminal investigations, paternity testing, and genetic ancestry, among other areas. His innovation was significant not only for its scientific contributions but also for its profound impact on the justice system, as it provided a reliable means to link suspects to crime scenes or to exonerate individuals wrongly accused.

The other individuals mentioned, while influential in their respective fields, did not contribute to the development of DNA fingerprinting. Francis Galton is best known for his work in eugenics and statistics; Robert Peel is recognized as a founder of modern policing; and Clive Popay is noted for his contributions to public health and evidence-based practice.