The U.S. Department of Labor’s MSHA (Mine Safety and Health Administration) has about 75 special investigators in refresher training with work conducted by the Federal Bureau of Investigation.
MSHA has also been working along with the FBI to improve their skills by developing course work. The classroom instruction is 2 weeks long in Beaver, WV. They cover topics including proper interview techniques for investigations, use of injunctive relief in federal district courts, evaluating evidence, reviewing knowing and willful violations, and processing discrimination complaints.
To view more on this topics, go to http://www.dol.gov/opa/media/press/msha/MSHA20120651.htm.