"Dr. Fackler’s retirement did not conclude the U.S. Government’s reliance on his expertise. On April 11, 1986, FBI agents engaged in a 4 ½-minute gun battle with two suspected bank robbers. The two suspects succumbed from their wounds but not before one of them killed two FBI agents and wounded five others. To its credit the FBI launched a full review into the lack of effectiveness of the handgun ammunition it employed. It called upon outside medical and other experts, including Dr. Fackler, to participate in meetings it hosted in 1987 and 1992. Its focus was on terminal ballistic effectiveness rather than undefined lay terms, such as “increased lethality” and “stopping power”.
Other corrective measures followed. In August 1988, the first steps were taken in establishment of a world-class FBI Ballistic Research Facility to evaluate terminal effectiveness of law enforcement ammunition, utilizing 10% ballistic gel, for dissemination of test and evaluation results to law enforcement departments. In 1989, the FBI published “Handgun Wounding Factors and Effectiveness,” based on comments at its 1987 experts meeting."
http://www.sadefensejournal.com/wp/father-of-modern-wound-ballistics/
