Click on Murphy. What does he use poison for? to kill rats
Why were his fingerprints on a spoon in Ms. Ranger’s RV? He wanted to make Apollo sick so he poisoned
him.
Use your tools to collect two pieces of evidence from Murphy.
What two pieces of evidence will you collect from Murphy? DNA sample and bite impressions
(Using your observation skills) – Why didn’t we collect a hair sample from Murphy? He’s bald
CSI LAB (SECOND VISIT)
There are 7 pieces of evidence to be analyzed. Click and then drag the evidence to an appropriate station
(when the evidence glows yellow, it means you can analyze that evidence there) and follow the instructions
to complete the analysis.
Drag Ranger’s bite impression to the Light Table
Bite marks are not as unique as fingerprints or DNA
However, they can be used to rule out a suspect
Follow the steps to make a cast of Rangers top and bottom teeth.
Are Deborah Ranger’s teeth a match to the victim’s bitemark? yes no
Drag Ranger’s hair sample to the Comparison Microscope.
Follow the steps to analyze Ranger’s hair. Does Ranger’s hair match the unknown sample? yes no
Drag Murphy’s bite impression to the Light Table. Repeat the same steps to make a cast of Murphy’s top
and bottom teeth. Click “Do it myself”
Are Murphy’s teeth a match to the victim’s bitemark? yes no
Drag the Trace Blood evidence to the DNA Station
Follow the steps to analyze the trace blood. Is it animal or human blood? Human blood
Compare the DNA profile of the trace blood to the victim’s blood. Does it match? yes no
What did you learn from these DNA profiles? Marco Williams’ blood is in the vet’s office
How do you know? The DNA profiles were identical
Who is our Number One suspect now? Dr. Sariel Knox – Veterinarian
Worksheet created by Susannah M. Comfort - Teacher at Snell Farm Campus School, Bath, NY
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