The camera that is best used for crime scene Photography is a single-lens reflex camera, also known as SLR. This camera allows you to use interchangeable lens.
you need to be strong minded to be a crime scene investigator
To the best of my knowledge the professional person who investigates a crime where it was perpetrated is called "a crime on scene investigator".
Canon camera cases can be purchased from many camera and photography stores. In the Chicago area, one can turn to independent photography stores or Best Buy.
Manual or Aperture Priority.
The best digital camera for amateur photography is mostly subjective. There are however some models that are popular with amateurs and a few examples of these are: Nikon D80, Canon Digital Rebel T2i and Pentax K200D.
A digital camera would probably be best suited. there is really no need for a professional camera unless you are a pro or you are deeply into photography.
This is a good site which may help: http://digital-photography-school.com/best-camera-bags-as-rated-by-digital-photography-school-members Best Buy, Ebay and Tiger Direct also seem to have a wide variety of bags
24-105MM Zoom Lens is the best for me.
Helmet Cameras are a great option for underwater photography. They make diving handsfree but are not necessary or realistic for shallow photography. If you are a professional photographer than a helmet camera is probably the most efficient option for you.
A Digital SLR is the best camera to buy for a photographer. Canon and Nikon produce excellent cameras in this range.
When you need to find out about crime scene investigator training the best place to look would be an online university. They will list the locations, prices and lots of useful information about their crime scene investigator training courses.
The manual that comes with your camera or down load the manual from the appropriate website.