Analysis of Crime Scene Evidence
Bloody Shoe Print:
A shoe print was discovered at the crime scene. After spraying the shoe print with luminol, it exhibited a chemiluminscence which indicates the presence of blood. 
Luminol kit purchased from Ward’s Natural Scientific.
Studying various characteristics of shoe prints from Mr. Ells, Mr. Daly, Mr. Marshall, and Mr. Lenne indicated that the bloody shoe print was made by Mr. Marshall. 
Shoe print analysis activity taken from the book Crime Scene Investigations: Real-Life Science Labs for Grades 6-12 by Pam Walker, Christopher Stone, and Elaine Wood.
Blood Spatter:
Analysis of the blood spatter pattern indicates that the victim was hit in the head by the laptop four times and then dragged to the location where his body was found. Analysis also indicated the point of origin and led investigators to find a small silk fiber.
Fibers:
Students conducted an odor, burn, nitrogen, and stain test on each of six different known fiber samples. Biotech detectives discovered that the fiber found on the chair was wool (Mrs. Schroeder placed her wool sweater over the chair) and the fiber found at the point of origin was silk (Mr. Lenne was wearing a silk shirt).
Fingerprints:
Fingerprint evidence indicates that Mrs. Sharp’s fingerprint was on the outside TRC door handle and Dr. Hayes’ fingerprint was on the coffee mug.
Blood Typing:
The blood typing results indicate that the victim’s blood type matches the blood spatter (sample 1) and the blood found on the laptop (sample 2). Mr. Ellis had blood on his pants (sample 3) which is consistent with his own blood type.
Blood typing kit purchased from Carolina Biological Supply.
Bite Mark:
A bite mark was found on the body of the victim. After analyzing the teeth impressions by the 10 major suspects, biotech detectives concluded that Mr. Ellis bit the victim’s arm.
Bite mark kit purchased from Vandalia SciEd.
Hair:
Microscopic analysis of the hair found on the laptop is consistent with a hair sample obtained from Mrs. Elser.
2 responses so far
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I told you guys I didn’t do it. Larry
Great job.
Any idea why 4 colleagues were wearing tennis shoes that day?
Was it a “jeans” day. Congrats a a job well done.
wsh