Crime Scene Investigation

In Mr. Kelly's class we did a lab that was just like CSI(the tv show). We had to analyze evidence and we had suspects and everything. My partners were CJ Coronado, and Jeremy Bertarioni. We had a crime scene that was a potential homicide. This meaning that someone tried to murder someone else but failed, OR someone killed someone but put the body somewhere else. At our crime scene we had 2 different blood types: A & B. Also we had a hair: it was weave we believe. (haha that rhymed.... sorry back to the Crime......) We also had a fiber it was cotton. We found a cotton ball at the scene of the crime... it had an odor that seemed to be a type of shampoo or perfume/cologne of some type. We also had a gold chain. There were 8 suspects we had to choose from. Most of which had a rap sheet, that wasnt pretty. After narrowing it down 4 prime suspects: Sam Tilson, Ralph Johnson, Kooladria, and Jenny Cho. Sam Tilson has attempted homicide on his rap sheet. While Kooladria has prostitution on hers. Kooladria and Jenny both have on gold chains in their pictures. SO here is how i see what happened.............. It was a dark and lonesome night....... haha just kidding now this is for real..... .Ralph Johnson wanted to have some fun so he drove down 'Hooker Lane' (hahaah) and picked up Kooladria. After they had their fun he saw her gold chain and yanked it from her neck. She attempted to get it back but he was stronger and he tried to kill her but luckily she escaped with only a few strands of her weave left at the scene............. therfore leaving the blood off both the suspects at the scene.... and Kooladria's gold chain.

My team mates may have differet suspects for they saw the crime differently than I. For in every Investigation there are different observations. (that sorta rhymed... right? ahah)

This is everything i have from the CSI lab. Hope you enjoyed this amusing post.

Crime Scene Investigation 2

Crime Scene Investigation

Blood Typing

There are 4 different types of blood: A, B, AB, O. Everyone in the world has one of these types of blood. O blood is the most rare type of blood ther is. Someone with O blood is a universal donor. They can donate to anyone with any type of blood. Scientists use blood to eliminate or single out suspects in the crime. Blood types were discovered in 1901. Biologists couldnt figure out why some patients lived and others had bad reactions. In 1901 Karl Landsteiner won a Nobel Peace Prize for discovering three blood types A, B, O. 1902: The blood type AB is found. Ever since these discoveries scientists and doctors have been able to help many people.

A blood can be donated to A, or AB
B blood can be donated to B, or AB
AB blood can be donated to A, B, or AB
O blood can be donated to A, AB, B, O because it is a universal donor

The Rh factor helps scientists and such determine whether someones blood is either: A-, A+, B-, B+, AB-, AB+, or O-, O+.

History of hair and fiber analysis

One of the first papers on hair analysis was published in France in 1857. & by the early 1900's microscopic examination of hair was established and well used. A single hair holds information which can help us find out the race, sex, and the age of its owner, even though a fingerprint can hold more information a single strand of hair will do if that is all to be found. Hairs can be found anywhere: On the suspect, the victim, the crime scene, etc. Hair is composed of many many elements. But the most common are protein substances and keratin. Hairs absorbent property comes in handy with arsenic poisoning cases, because it is found in the hair. Examination of the roots can help let scientists know if the hair had fallen out or if it was forcefully removed. Scientists can find whether hair is human or animal, what race it is, what species of animal if animal hair, or what body part it came from. Fibers although let the scientists know what kind of clothing the suspect was wearing or has. Fibers which are synthetic must be identified with infrared spectrophotometry. Scientists can determine a fibre by the way it absorbs light. This is all i can find about hair and fibers.

Handwriting

It is said that no two people write the same, but should we really believe that?

OF COURSE!!!!! No one can write the EXACT same way someone else does. Someones handwriting is their 'mark' on everything they sign, wills, deeds, and checks. Handwriting gives authenticity, credibility, and authority over what they are signing. Typed signatures mean nothing, they are not proof like hand written signatures are. In school we were taught to trace cursive in a book, but after we learned that we put our own twist on it. We give it our own style, therefore making it our own, making it our unique way of being different.

There are two different types of handwriting: request writing and nonrequest writing. Request writing doesn't hold in court because it gives the person a chance to change the way they write, where as nonrequest writing does hold in court because the person doesn't have a chance to change it.

In certain criminal cases, handwriting is very important. It gives the criminal NO way out. They cant escape the crime they have committed, because their handwriting may match the evidence found.

History of Fingerprinting

Fingerprinting has been around for a very long time. It is said that no one really knows how far back fingerprinting goes but we for sure know it was around in 2000 BC, when the egyptians were building pyramids.

Fingerprinting has helped the usa in the past 100 years by providing accurate identification of criminals. There has never been the same 2 fingerprints of any human beings in the whole world, in the whole time fingerprinting has been used. Fingerprints at crime scenes prevent more evidence, more suspects, and ect. Lots of human characteristics can change but out of all of those fingerprints never change, they stay the same forever. What you have is what you get. They help people all over the world, and will continue helping for as long as this world lasts.