Murder Mystery
What we did was read a description of the crime that had been committed.
Events at the Crime Scene:A bonfire was held on the san marin campus on april 3, in honor of Captain Cornball. CC was recently released from prison and has changed his name. At 7:30 p.m. Captain Cornball and his acquaintances sat down for dinner. At 7:35 pm the sky got dark, people screamed and Captain Cornball groaned loudly. 7:36 p.m. the sun returned to show Captain Cornball face down in his bowl and a steak knife in the back of his neck. 7:40 p.m. the police were called. 7:55 p.m. the police arrived. 8:00 p.m. captain cornball is pronounced dead.
Evidence Found at the Crime Scene:
. Fingerprint found on broken glass
. A note
. Three different types of pens (assuming one was used to write the note)
. Two types of blood found on murder weapon (A and O)
. Strand of hair
. Karyotyping (detect chromosomal abnormalities)
My team and I began to make karyotypes for each of the people at the crime scene. By doing this we could see i there were any chromosomal disorders such as Huntington's Disease, Down Syndrome, and others. After that we proceeded to analyze the fingerprint found on the glass at the crime scene. We looked at the print under the light microscope at 4x and 10x power. Then identified recognizable features from fingerprint( whorl, loop, arch). Next, we dusted it with fluorescent powder and a feather duster. Then photograph the print through the amber shield on the microlight. We then lifted the print off the slide with the lifter film, peel off the protective backing and place the sticky side of the lifter film on print then lift it and fold down on the pre attached lifter card. Finally we attached and labeled the prints and compared the print taken from suspects at the crime scene. It was a unanimous decision that print on the glass belonged to Sam Stubs.
A pen was used to write a note saying, "U R a dead man". We then examined the pan to figure out who the pen belonged to using Chromotography. Chromatography is a process by which you separate a mixture by passing it in solution or suspension or as a vapor (as in gas chromatography) through a medium in which the components move at different rates. For this process we put a small amount of isopropyl alcohol at the bottom of a small beaker. The next step is to place a strip of chromatography paper with a dot from each pen found at the crime scene inside the beaker just barely in the alcohol, with the dot at the bottom. We allowed the solvent to move up the paper for at least 10 minutes. You then measure the distance the solvent traveled and the distance the pen ink traveled. The distance and resemblance led us to conclude that the pen belonged to Sam Stubs and Norma Nanny.
There was two types of blood found on the murder weapon(A and O). We concluded that the O blood belonged to Captain Cornball because the knife was in his back. All that was left was to find out who else's blood was on the knife. For the blood typing portion we were determining the blood type of the people at the scene due to blood samples found. In order to find a person's blood type you put five drops of blood into a well and one drop of selected antiserum (anti-A or anti-B) to the well and rock to mix. If it reacts to the serum, gets clumpy, then it is that type. We found that Norma Nanny and a few others matched the blood sample.
Lastly we examined the hair found at the crime scene. We looked at it under a microscope and compared it to wool, dog hair, and human hair. The sample found was a human hair.
All that was left to do was meet with my group and discuss who we thought the murderer or murderers were. The paragraphs and our slide show are below.
What I learned about:
-Human genetics/inheritance
I learned about how to use Punnette squares to determine the probability of the inheritance of genes. `
-Genetic Diseases
I learned about how different diseases like Huntington's Disease and Marfan's Disease are passed down and the effects they have on the body.
-Chromosomal abnormality
I learned about how to identify chromosomal abnormalities in karyotypes. Down Syndrome is when there are one too many chromosomes on the 21 chromosome
-DNA fingerprinting, sequencing, forensic science
I learned how to dust fingerprint like I described above, use chromotography, compare hair samples, and find blood types.
Reflection
I liked how complicated this project was and that we use actual strategies that real CSI investigators use.
I wonder if we could've had more criminalists or people like him come and help us with our projects and explain it right next to us. Help us individually.
What we did was read a description of the crime that had been committed.
Events at the Crime Scene:A bonfire was held on the san marin campus on april 3, in honor of Captain Cornball. CC was recently released from prison and has changed his name. At 7:30 p.m. Captain Cornball and his acquaintances sat down for dinner. At 7:35 pm the sky got dark, people screamed and Captain Cornball groaned loudly. 7:36 p.m. the sun returned to show Captain Cornball face down in his bowl and a steak knife in the back of his neck. 7:40 p.m. the police were called. 7:55 p.m. the police arrived. 8:00 p.m. captain cornball is pronounced dead.
Evidence Found at the Crime Scene:
. Fingerprint found on broken glass
. A note
. Three different types of pens (assuming one was used to write the note)
. Two types of blood found on murder weapon (A and O)
. Strand of hair
. Karyotyping (detect chromosomal abnormalities)
My team and I began to make karyotypes for each of the people at the crime scene. By doing this we could see i there were any chromosomal disorders such as Huntington's Disease, Down Syndrome, and others. After that we proceeded to analyze the fingerprint found on the glass at the crime scene. We looked at the print under the light microscope at 4x and 10x power. Then identified recognizable features from fingerprint( whorl, loop, arch). Next, we dusted it with fluorescent powder and a feather duster. Then photograph the print through the amber shield on the microlight. We then lifted the print off the slide with the lifter film, peel off the protective backing and place the sticky side of the lifter film on print then lift it and fold down on the pre attached lifter card. Finally we attached and labeled the prints and compared the print taken from suspects at the crime scene. It was a unanimous decision that print on the glass belonged to Sam Stubs.
A pen was used to write a note saying, "U R a dead man". We then examined the pan to figure out who the pen belonged to using Chromotography. Chromatography is a process by which you separate a mixture by passing it in solution or suspension or as a vapor (as in gas chromatography) through a medium in which the components move at different rates. For this process we put a small amount of isopropyl alcohol at the bottom of a small beaker. The next step is to place a strip of chromatography paper with a dot from each pen found at the crime scene inside the beaker just barely in the alcohol, with the dot at the bottom. We allowed the solvent to move up the paper for at least 10 minutes. You then measure the distance the solvent traveled and the distance the pen ink traveled. The distance and resemblance led us to conclude that the pen belonged to Sam Stubs and Norma Nanny.
There was two types of blood found on the murder weapon(A and O). We concluded that the O blood belonged to Captain Cornball because the knife was in his back. All that was left was to find out who else's blood was on the knife. For the blood typing portion we were determining the blood type of the people at the scene due to blood samples found. In order to find a person's blood type you put five drops of blood into a well and one drop of selected antiserum (anti-A or anti-B) to the well and rock to mix. If it reacts to the serum, gets clumpy, then it is that type. We found that Norma Nanny and a few others matched the blood sample.
Lastly we examined the hair found at the crime scene. We looked at it under a microscope and compared it to wool, dog hair, and human hair. The sample found was a human hair.
All that was left to do was meet with my group and discuss who we thought the murderer or murderers were. The paragraphs and our slide show are below.
What I learned about:
-Human genetics/inheritance
I learned about how to use Punnette squares to determine the probability of the inheritance of genes. `
-Genetic Diseases
I learned about how different diseases like Huntington's Disease and Marfan's Disease are passed down and the effects they have on the body.
-Chromosomal abnormality
I learned about how to identify chromosomal abnormalities in karyotypes. Down Syndrome is when there are one too many chromosomes on the 21 chromosome
-DNA fingerprinting, sequencing, forensic science
I learned how to dust fingerprint like I described above, use chromotography, compare hair samples, and find blood types.
Reflection
I liked how complicated this project was and that we use actual strategies that real CSI investigators use.
I wonder if we could've had more criminalists or people like him come and help us with our projects and explain it right next to us. Help us individually.