Mystery Writer's Guide To Forensic Science - Collecting Evidence V

Over the next few weeks, we're going to be discussing the collection of evidence at a crime scene. I've decided to list things to collect and how to collect them alphabetically. This week in the alphabet of crime collection, we will be examining letters:

P

Paint

(on tools or vehicles)

• If possible, collect the item containing the evidence
• Collect paint chips separately (without fragmenting)
• Take reference samples of each color, ensuring they are scraped down to the base color
• To package, use paper or rigid plastic container

(on clothing)

• Collect fragile evidence first
• Collect clothing and package individually

Postmortem Samples

(Alcohol)

• Obtain clean arterial blood (10 ml)
• Obtain urine (10 ml)
• Obtain vitreous humor (10 ml) (the liquid in the eyeball)

(Blood for DNA)

• Obtain clean arterial blood (10 ml)

(Blood for serology)

• Obtain clean arterial blood (10 ml)

(Drugs)

• Obtain clean arterial blood (10 ml)
  
• Obtain urine (10 ml)

(Toxicology)

• Obtain clean arterial blood (10 ml)
  
• Obtain urine (10 ml)
  
• Obtain vitreous humor (10 ml)
• Obtain stomach contents

(Diatoms)

• Obtain a portion of femur (15 cm)

Sources: http://www.crime-scene-investigator.net/evidenc3.html
http://www.crime-scene-investigator.net/collect.html#8
(2) Encyclopedia of Forensic Science
Picture sources: here