Investigations are conducted within the geographical area of Northern California, Oregon and Washington State. If you choose to collect physical evidence, you do so at your own risk. While it is of extreme importance to collect, analyze and evaluate evidence in UFO cases, your personal safety is far more important. The leading cause of physical evidence being excluded from criminal courts is contamination, UFO cases are no different. Contamination occurs when evidence is handled in a manner that alters its original state.
Many colleges now offer courses in criminalistics and evidence collection.
Any book on the subject of criminalistics authored by Richard Saferstein is highly recommended.