crime scene recording

why do we record crimes

• accurately records all findings at a crime scene

• start of continuity chain

how do we record crime scenes

• contemporaneous notes

• diagrams

• videography/photography

sequential processing

1. visual examining

2. recording

3. evidence recovery including packages

4. search for latent evidence

5. walk through and final examination

notes should be

• accurate

• comprehensive

• relevant

• factual

• dated

common errors in note taking

• forgetting time and date

• incomplete sections

• sampling out of order

• signatures

3 Pilars of photography

ISO - sensitivity of camera to light

Aperture - opening of lens to control amount of light entering

Shutter speed - length of time camera shutter is open

ISO

• as you increase the number the brighter the photo will be

• 100,200,400,800,1600,3200,6400

• photo taken at to high of a number will show a lot of grain

aperture

• larger the f number the smaller the diameter

• low numbers = wider aperture

• low numbers = smaller aperture

• range F8-F16

Depth of field

everything which appears crisp and clear, other than, but also including the point
of focus

crime scene photography

general images - routes and entry points

long - further general views of the scene but begin to locate evidence

mid range - focuses on item or interest but still shows surroundings

close up - shows evidence in greater detail