Case study

CASE STUDY

90210 Murder solved in The O.C.
Beverly Hills, California.On Tuesday, February 27, 2007 a jury in Los Angeles County convicted "a parolee with a lengthy criminal record" of Attempted Homicide and Second Degree Homicide in the fatal stabbing of Jurgen Hapke, 65 of Burbank. (See NBC4.tv story here)The murder occurred at a Wells Fargo Bank in Beverly Hills on December 14, 2005.Hapke was killed when he tried to stop the defendant, Nathan Lee Hall, 51 from stabbing Hapke's business partner, Helmut Mende while both were painting the exterior of the bank.No one really knows why the defendant tried to kill two elderly men in a bank parking garage because the jury never got to hear much about the defendant's background during the trial, but the execution of Tookie Williams, which had taken place the day before this crime, may have provided a motive! (See previous post on the execution)What was heard by the jury was compelling testimony about the physical evidence from the crime scene that was ultimately linked to the defendant.DNA evidence from items left behind in the bank parking lot were examined by the Orange County Sheriff's Crime Lab within hours of the crime and the DNA profile from those items was matched in the State's DNA data base to the suspect.The OCSD Crime Lab was used at the request of the Beverly Hills Police Department which engaged in a special one-time contract for the work.Orange County Sheriff's Forensic Services Supervisor Russell Baldwin was the scientist that conducted and analyzed the physical evidence that consisted of a scarf, a hat and the murder weapon to find the DNA used for the match.Supervisor Baldwin's testimony at the Los Angeles County trial covered a couple of days that included intense cross-examination and an opposing defense witness that challenged the DNA evidence and the credibility of Supervisor Baldwin.The jury deliberated for three days before finding the defendant GUILTY!The importance of DNA evidence cannot be understated and the collection of DNA into a State database was authorized by Proposition 69 (as detailed in this previous post).DNA has been extremely important in solving "cold cases' which are those that were not solved at the time of the incident because in many cases the technology did not exist or was not as sophisticated as it is today. (See this previous post on cold case DNA hits)But this was not a cold case!Nathan Lee Hall was identified through DNA evidence and arrested within nine days of the murder - the result of good police work and GREAT forensic science evidence work!

this is just one case that had been solved thnks to forensic scientists but there are many other cases that have been solved thanks to forensic science too.

this was my final post thank you for looking if your not my teacher and feel free to comment

DNA finger printing

DNA finger printing

dna finger printing is used by forensic scientists to help identify an individual based on their DNA profile

Although the vast majority of human DNA sequences are common in humans, DNA profiling makes use of highly variable repeat sequences, called variable number tandem repeats

The technique was first reported in 1985 by Sir Alec Jeffreys at the University of Leicester in England, and is now the basis of several national DNA databases.

microscopes

microscopes


why we use them

we use microscopes so that we can see really small things .............

like cells in animals or plants

we also use microscopes to look at things in greater detail maybe so we can classify it more easily

how microscopes work

microscopes use a series of lenses and zooming in and out to help you see objects that are to small for us to see.

who invented the microscope

The first microscope was made around 1595 in Middelburg, Holland. Three different eyeglass makers have been given credit for the invention: Hans Lippershey (who also developed the first real telescope); Hans Janssen; and his son, Zacharias. The coining of the name "microscope" has been credited to Giovanni Faber, who gave that name to Galileo Galilei's compound microscope in 1625. (Galileo had called it the "occhiolino" or "little eye".)

blood types

blood types

blood types were first called for after thye 1600 after doctors tried to use animal blood as blood transfusion donors the results were disastrous

There are eight blood types

AB




AB -




A +




A -






B +




B -






O +






O -


with AB- being the most rare amongst them.

also you dont need the same blood as some else to get a blood transfusion some blood types are compatable

If there is any questions you need to know about my blog email is E186@manorcollege.co.uk

chromatography

what is chromatography basically chromatograpy is a means to an end its used to split up different types of liquids using water and a sample of the liquid at the scene of the crime

from tihe results you could tell maybe which pen was used to write a ransum note then you could look for fingerprints.

.chromatography has been used since around the 19th -20th century and basically means colour writng

Paper chromatography is a technique that involves placing a small dot of sample solution onto a strip of chromatography paper. The paper is placed in a jar containing a shallow layer of solvent and sealed. As the solvent rises through the paper, it meets the sample mixture which starts to travel up the paper with the solvent. This paper is made of cellulose, a polar substance, and the compounds within the mixture travel farther if they are non-polar. More polar substances bond with the cellulose paper more quickly, and therefore do not travel as far.

finger prints

This is my forst post for my school project so here are some facts on finger prints

Did you know that there are 4 types of finger print

Arch

Loop(Right Loop)

Whorl

Arch(Tented Arch)

finger prints have been used to solve crimes for a long time now but here are some of the flaws of using finger print identification one they can be affected by liquid or oily substances.

What a finger print really is when friction ridges on your finger leave an impression on an object

the friction ridge is also know as epiderims which in normal english means the outer layer of your skin.

A fact eveyone knows

there are no finger prints exactly the same

but what i want to know is if identical twins have the same fingerprint?