PRESENTATION OUTLINE
Dried clay, can be used to trace locations of a suspect Analysis by a soil scientist at a chemical labratory
Wax seal, can easily be traced to a single source through the maker of the stamp. Usually can be traced to a single person or family.
A button can be traced back to a single piece of clothing or a brand. An expert on cloth fibers could probably be contacted to analyze the button, since they work with similar materials.
With any luck, this chewed gum could be analyzed for dried saliva. It could be sent to a DNA analyst for confirmation.
A rotten tooth is a lucky piece of evidence, seeing as it could be analyzed for DNA by the same specialist.
The broken pencil lead is indicative of hurried writing, and can be a hint to a written note somewhere. It can be sent to a chemist to determine its origins.
The red powder, in this case paprika, can be sent to a chemist to determine the nature and origin of the substance, thereby constricting the suspect pool.
The twist tie can be sent to a lab for possible latent fingerprints. It also indicates that something, such as a long cord, was being held together for transportation purposes.
The wires could be used for electrical purposes, or garroting/tying a victim. Therefore it could be sent to an electrician for identification, and then an expert on residues to determine if it had been used for any alternate purposes.
As we learned earlier this year, this hair can narrow down the suspect pool by quite a bit. It would need to be sent in for analysis under a microscope but could yield very telling results.
Even if the match is wholly burnt, it can still be of use. A chemist can determine if a fire was set by the match based on the residues left behind after burning.
Rice would be a very strange thing to find at most crime scenes, so it would be sent to a lab for multiple tests by a chemist and close examination under a microscope. An intentionally left grain of rice may indicate a disturbed or communicative suspect.
The wood shaving could denote a person working in a specific field (e.g. carpentry), but could be taken to a dendrologist for identification purposes.
The fingernail would need to be taken in to search for any possible DNA left underneath the nail, or any identifying substances that may be found there as well. Indicative of a struggle, a broken fingernail can prove very useful at a crime scene.
