What should be done before a crime scene is photographed?

items should be moved so they are in better light

the area should be cleaned so items can be better seen

any items that were already moved should be documented

a finished sketch should be produced

What should be done before a crime scene is photographed?  

A finished sketch should be produced. :)

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.