How else can you use spectroscopy in forensics other than just finding compound compositon

Question: How else can you use spectroscopy in forensics other than just finding compound compositon
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Asked by Chairman Mao Zedong to Arlene on 7 Nov 2015.
- Arlene McBroom answered on 7 Nov 2015:
  
  You can use spectroscopy to determine the end point of a chemical reaction. And I’ve also used it to do some pretty cool things like work out how much water is in something and monitored the compound drying.

Question: How else can you use spectroscopy in forensics other than just finding compound compositon