New techniques help trace heroin / BBC, 27 August 2008
http://news.bbc.co.uk/1/hi/scotland/glasgow_and_west/7582726.stm
"Forensic profiling has been developed in Glasgow to help trace the source of heroin arriving on the streets of Scotland. The Scottish Police Services Authority is analysing seized drugs to identify where they were processed and stored. Scientists from the authority are also studying the cutting or diluting agents to build a profile of the supply chain."