Chemical composition of latent fingerprints using GC/MS

I have done an experiment on the lab about Chemical composition of latent fingerprints using GC/MS”. I want you to write the introduction, and the experimental procedure. For the introduction talk about fingerprints, also about the instrument used which was Hewlett Packard HP6890 GCMS, I will attach a schematic of the instrument. last summarize the procedure of the experiment.