Bio Lab Report Crime Scene
On Saturday morning of the 24th of October, there was report by an employee of a homicide incident on 4011 N. Central Eave, Phoenix, AZ. University Center building on the 3rd floor of Arizona State University. The victim was describe as a 24 year old Caucasian female, by the name of Kelly; who works as a programs coordinator for Arizona State University. The victim was working late hours as usual on a Friday night, she was on her office cubical.
The body was found laying on the floor in front of her desk chair, the body was facing up with three bullet wounds on her body; the action of the shots were one in right shoulder, right hip, and middle of the stomach. Observations found in the crime scene were the chair was knocked over, the victim was facing up instead of facing down. There were bullet holes in the wallboard as well as the cabinetry and biological stains of the victim. Information gathered about the victim she appeared to be talking to her mother while the incident happen, and it was not unusual seen her work late at night.
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Also, there was some information about five suspects that might have been involve in the homicide. Licensee Scale S. Microbiology Professor, at the time of the murder he stated he was looking for money from students so he could buy another pint of beer, and was wearing blue t-shirt and jeans. Daffy Patrick D. Microbiology Lecturer, at the time of the murder he stated he was drinking at Hooters and was hearing a blue button down shirt and black pants.
Olson John P. Biology Professor, at the time of the murder he stated he was at an all night Chinese buffet, and was wearing blue flannel shirt and Jeans. Hutchins Jason O. Chemistry Lecturer, at the time of the murder he was teaching Chemistry 101 lab, and was wearing a blue polo shirt and Jeans. Waffle Debra A. Lab Technician, at the time of the crime scene she stated she was preparing for Microbiology 206 lab, and she was wearing blue lab coat and khaki pants.
The homicide case is under investigation, once there has been examine the pieces of hair, fabric, and blood samples from the suspects, it will be determine who was the murder of the victim. Methods and Materials The investigation began by first collecting evidence from the crime scene and suspects. This includes fingerprints, hair and fiber samples, along with blood samples. Along with these, a bullet was found at the crime scene, which was added to the list of evidence. Fingerprint Testing To collect the fingerprints from both the suspects and the crime scene, the print lifting technique was used.
This method included using a fingerprint wand and powder to dust the fingerprints on the object, and then putting adhesive tape over the latent prints to “lift” the fingerprints’ image. The adhesive and fingerprint were then transferred to a backing card to be examined. To analyze the prints, a magnifying glass was used to determine if the prints pattern was an arch, loop or whorl. The fingerprints examined are a type of biological evidence. Fingerprints Suspect Arch Loop Whorl Daffy x Hutchins
Licensee Olsen Waffle We then compared these fingerprint patterns with the fingerprint collected at the crime scene, which was a loop. Metallurgy Next, the bullet found at the crime scene was tested using metallurgy. The bullet was a type of physical evidence. To determine what type of metal the bullet was made of, the densities of the three standard metals in the tool kit had to be determined. To measure the metal’s mass, an electronic scale was used while a water displacement was used to measure the volume. From these measurements, the density was calculated (D=MN).
The mass, volume and density of the metals in the kit were lactated as follows: ; Aluminum o Mass = 8. 27 g Volume = 4 ml = 2. 07 vim Density = MN Copper Mass = 57. 1 g Volume = 7 ml Density = MN = 8. 16 g/ml o Mass = 37. 95 g o Volume = 4 ml o Density = 9. 49 g/ml As stated before, to find the volume for all the measurements, water displacement was used. By this, the change in the water level (measured in ml) in the graduated cylinder was measured before and after each metal was added to determine its volume.
For the bullet, it was determined that: o Mass = 12. 9 g o Volume = 2 ml o Density = 6. 45 g/ml Because the bullet was silver, it was determined that it was not made of copper and u to the fact that density wasn’t similar to aluminum, it is likely that the bullet was made of steel and maybe another metal. Fiber and Hair Testing The next pieces of evidence that were analyzed were hair and fiber. The hair samples are a type of biological evidence while the fibers are a type of physical evidence.
For these samples, microscopy was used, which allowed the researchers to examine and identify the fine features of each. The tables below include the collected data. Hair Color Features Brown Short, smooth Blonde Short, split Black Short, wiry Evidence Fiber Texture Blue Woven, denim-like Pink Tight, cylinder-like Tulle Wispy, feather-like Tulle and wispy/feather By comparing the evidence found at the crime scene to the samples collected from the suspect, it narrowed the possible suspects down to Olsen and Waffle since both of their fibers were found at the crime scene.
Blood Testing The last task was to examine the blood samples collected from the suspects to the blood found at the crime scene. The blood samples were a type of biological evidence, but chemical reactions were used to determine the blood type. “Anti-A Serum,” “Anti-B Serum” and an “Anti-Re Serum” were used to test what type of blood he samples were and if they had an Re D antigen. Three drops of each suspect’s blood, along with the blood collected at the crime scene, were placed into three different wells of a clean blood typing plate.
Three drops of each serum were added to the three different wells and then stirred until they either reacted or remained inactive to the serum. A way to tell if the blood reacts to the serum is if it results in agglutination, or clumping. The results are listed in the table below. Suspect Reagent ABA-Re Blood Type Anti-A Serum Anti-B Serum Anti-Re Serum A+ Because some of the blood tests didn’t react with the serum, the researchers had to SE the blood type information provided in the suspect’s profile and then determine how the blood would have reacted if the tests worked properly.
Analysis: Fingerprint Testing: After analyzing the data from the crime scene and the suspect sheets provided some educated assumptions can be made as to the possible perpetrator. The prints found at the scene of the crime had a loop configuration. Considering Licensee has an arch configuration, and Hutchins has a whorl configuration, they were ruled out as potential suspects. The suspects who possessed prints similar to those found at the scene were as follows: Daffy, Olsen, and Waffle.
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