1. Assistant professor, graduate student, and undergraduate student, respectively, Department of Criminal Justice, University of Illinois at Chicago Circle, Chicago, Ill., US.
2. Criminalistics Division, Chicago Police Department, Chicago, Ill., US.
3. Professor, Department of Energy Engineering, University of Illinois at Chicago Circle, Chicago, Ill., US.
4. Assistant professor, Department of Geosciences, Purdue University, West Lafayette, Ind., US.