Crime Scene Investigation

Scene 3: Residence and Surrounding Outside



Note left behind by Tyese Jefferson



Earlier in the day Tyese Jefferson ordered food which was made by Smokey Johnson, who had been the stalker of Jefferson who has a restraining order against Johnson, the drink contained iodine. Jefferson came home, where her dog resides, from work feeling sick, removed articles of clothing and then wrote a note stating “Someone please help me” before dying from the iodine poisoning which resulted from her thyroid problem. Later on Smokey Johnson breaks into her house and retrieves her body then leaves a note stating “You will never find her” and exiting through the yard with her body leaving his footprint and a fingerprint behind and snares her nylon clothing.

The fingerprint that was left behind was a perfect match to Smokey Johnson.

Fingerprint left= Match to Tyese Jefferson



Nylon Fiber possibly worn by Tyese Jefferson







Print left on glass by Tyese Jefferson

 

Heeled shoe worn by Tyese Jefferson



The restraining order that Tyese Jefferson had was a perfect motive for her murder.



Perpetrator
Smokey Johnson



Murder Victim
Tyese Jefferson



Iodine reacts with the thyroid causing Tyese Jefferson's death.



Liquid found containing Iodine



Liquid tested positive for Iodine



Poison

Poisons are substances that can cause disturbances to organisms, usually by chemical reaction or other activity on the molecular scale, when a sufficient quantity is absorbed by an organism.

·         Lye

·         Cyanide

·         Lead

·         Mercury

·         Ammonia

Cause:

·         Skin discoloration

·         Eye bulging

·         Bite marks

In this lab we tested samples for ammonia, metal poisons, iodine, cyanide, asprin, and sugar with indicators that identify the samples with color change and pH paper.

Witness Experiment

In the Witness Experiment the use of facial features to place together and identify a person is helpful when trying to spot your perpetrator. Remembering features as blue eyes, a mole, or a moustache can be helpful when identifying a unique perpetrator. In this experiment we pieced together the facial features of a person after being given time to remember the face.