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Of these vests, 60 (58 percent) were penetrated by at least one round during a six-shot test series.
Of those that passed penetration testing, 91 percent showed excessive "backface deformation," an indicator of the potential blunt trauma experienced by an officer wearing the armor.
As a result, body armor models that contain Zylon will not be compliant, unless their manufacturers provide satisfactory evidence to NIJ that the models will maintain their ballistic performance over their declared warranty period.
Also, until the new requirements become effective, Zylon-containing armor vests will not be eligible for purchase with federal funds through the BVP program. 254 Posted July 7, 2006 When a Zylon-based body armor that had passed NIJ standards failed to fully protect an officer in 2003, NIJ began investigating why.
Mesloh, 9 (1) Law Enforcement Executive Forum 121-128 (2009).
A baton that is too light or too small may cause an officer to strike a subject repeatedly to effectively control a suspect, which is perceived badly by both the media and the public.
NIJ's research also showed that ballistic-resistant material, including Zylon, can degrade as a result of exposure to environmental conditions, such as moisture and light.
* In 2009, 31 percent of students in grades 9 - 12 reported they had been in a physical fight at least one time during the previous 12 months anywhere, and 11 percent said they had been in a fight on school property during the previous 12 months..
Breakage of the oxazole ring correlates with degradation of the mechanical properties of Zylon fibers.
The Department is issuing a Body Armor Standard Advisory Notice to alert law enforcement to the potential risks associated with the use of Zylon in body armor, and will adopt new interim requirements for its body armor compliance testing program.
More information and a version of the guide are available at Cutting Data are drawn from several federally funded collections, including the National Crime Victimization Survey, Youth Risk Behavior Survey, School Survey on Crime and Safety, and the Schools and Staffing Survey.
School Violence: "Campus Attacks: Targeted Violence Affecting Institutions of Higher Education," a report b the U. Highlights include the following: * In 2008, among students ages 12 -18, there were about 1.2 million victims of nonfatal crimes at school, including 619,000 thefts and 743,100 violent crimes (simple assault and serious violent crime).