Click the PDA and read the message from Lt. Jim Brass. What did Brass get that will help collect evidence
from Dr. Knox? Search warrant
VET’S OFFICE (SECOND VISIT)
Click on Dr. Knox. Click on, “I have a warrant to collect evidence.”
What 3 pieces of evidence will you collect? Hair sample,
Bite impressions, and DNA
Use your tools to collect the 3 pieces of evidence.
CSI LAB (THIRD VISIT)
Drag Knox’s hair to the Comparison Microscope. Is it a match to the unknown hair? yes no
What should you do next? I have to run a mitochondrial DNA (mtDNA) test to confirm it
Drag Knox’s bite impression to the Light Table. Repeat the same steps to make a cast of Knox’s top and
bottom teeth. Click “Do it myself”
Do Knox’s teeth match the bitemark on the victim? yes no
So who caused the bitemark on Marco Williams’ arm? Sariel Knox probably bit him
How can we confirm this? We can match the bitemark saliva DNA to Knox’s DNA
Drag Knox’s DNA to the DNA Station. Choose Unknown Hair. Read about the process of mtDNA extraction
and complete the steps to analyze Knox’s hair using Mitochondrial DNA (mtDNA).
What were the results of the mtDNA test on Knox’s hair? This is probably Knox’s hair
Drag Knox’s DNA back to the DNA Station and click on Unknown DNA.
Compare the DNA of Knox to the unknown DNA found in the saliva on the bitemark of the victim.
Does Knox’s DNA match the DNA found on the victim? yes no
What did you learn from the DNA test? It is conformed that Knox bit Mr. Williams
Click on the PDA and read the message from Grissom. Click on the attachment and drag the correct clues
to the glowing boxes to answer his questions. You can click on each picture and read the description first.
What evidence shows that the suspect was at the crime scene? Knox’s hair at the scene
Who has access to the drug found in the victim’s body? Sodium Thiopental at Vets
Who bit our victim before his death? Knox’s DNA on Bitemark
Worksheet created by Susannah M. Comfort - Teacher at Snell Farm Campus School, Bath, NY
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