Here is a list of a few of my favorite websites I use when writing a mystery:
http://www.crime-scene-investigator.net/csi-response.html Includes Crime Scene Investigation resources, training, articles and links to forensic web pages.
http://www.ornl.gov/sci/techresources/Human_Genome/elsi/forensics.shtml Comprehensive resource covering forensic identification.
http://www.terryburns.net/COPS_CRIME.htm Articles related to crime scene investigations, physical evidence, death investigation, and DNA.
http://www.crimeandclues.com The Art and Science of Criminal Investigation.
http://www.dplylemd.com Writer's Medical & Forensic Lab
http://www.dplylemd.com Professional Investigator's Magazine
http://www.charlottedillon.com/WritersLinks.html Every story need a little Romance
http://www.writerswrite.com Great Site
Just a few I use for research, happy writing.