Gunshot Residue Sampling Procedures

The video tutorial explains the process of collecting gunshot residue (GSR) from a subject's hands using a GSR 600 sampling card. It covers the preparation of the sampling card, the dabbing and swiping techniques for collecting samples from specific areas of the hand, and the final steps to secure the sample for analysis. The tutorial emphasizes following agency protocols and avoiding contamination.

Where is gunshot residue most commonly found on the hand?

• On the fingertips

• On the back of the hand and webbing between fingers

• On the wrist

• On the nails

What should you inform the subject about before collecting a sample?

• That they need to wash their hands first

• That it will take a long time

• That firm pressure will be applied

• That the process is painless

What is the purpose of using gloves during sample collection?

• To keep the sampling card clean

• To avoid contamination of the sample

• To make the process faster

• To protect the subject's hands

What is the first step in using the GSR 600 sampling card?

• Remove the card from its bag

• Swipe the hand with the sample paper

• Remove the protective liner

• Dab the hand with the adhesive pad

What should you avoid touching to prevent contamination?

• The subject's hand

• The sample paper and adhesive pad

• The card's edges

• The protective liner

How many times should you dab the hand to ensure proper sample collection?

• At least 20 times

• At least 30 times

• At least 10 times

• At least 50 times

What is the next step after dabbing the hand with the adhesive pad?

• Remove the protective liner

• Press the label firmly

• Swipe the hand with the sample paper

• Fold the adhesive onto the sampling paper

What should you do after collecting the sample with the adhesive pad and sample paper?

• Fold the adhesive onto the sampling paper

• Remove the card from its bag

• Dab the hand again

• Inform the subject

How do you secure the sample on the card after collection?

• By placing it in a bag

• By pressing it with a thumb

• By folding the adhesive onto the sample paper and wrapping the label

• By using a stapler

What is the final step before the sample is ready for analysis?

• Press the label firmly to the back of the card

• Remove the protective liner

• Dab the hand again

• Inform the subject