Forensic Blood Testing Procedures

Sergeant Mike McCutchen demonstrates how to test blood stains to determine if they are human or animal. The process involves using Quick Check for a presumptive test and Hexagon OBTI for confirmation. The video covers the steps for collecting samples, interpreting results, and handling evidence. It emphasizes the importance of proper documentation and potential errors in testing.

What is the primary purpose of forensic blood testing as introduced in the video?

• To find the blood type

• To measure the amount of blood present

• To identify the species of origin of the blood

• To determine the age of the bloodstain

What does the Quick Check Blood Stained green test indicate?

• The blood type

• Whether the stain is blood

• The age of the bloodstain

• The DNA profile of the blood

What is the first step in using the Quick Check test?

• Taking a photograph of the stain

• Breaking the ampules

• Swabbing the stain with distilled water

• Applying the test solution

What should you be careful about when breaking the ampules in the Quick Check test?

• Holding the dropper upside down

• Mixing the solutions incorrectly

• Applying too much pressure

• Using too much distilled water

What is the purpose of the Hexagon OBTI test?

• To determine the blood type

• To confirm the presence of human blood

• To measure the amount of blood

• To identify the DNA profile

How many drops of the sample are needed in the Hexagon OBTI test?

• Four

• Three

• Two

• One

What does a faint second line in the Hexagon OBTI test indicate?

• A need to retest

• An invalid test

• A positive result

• A negative result

Which type of animal blood might give a false positive in the Hexagon OBTI test?

• Birds

• Deer

• Primates

• Raccoons

What is the most important step after obtaining a positive test result?

• Discarding the sample

• Re-testing the sample

• Taking photographs for documentation

• Sending the sample for chemical analysis

Where can you find more resources on forensic evidence processing?

• bloodtesting.com

• forensiceducation.net

• crimeanalysis.org

• evidencecollection.edu