Criminalstic

Buckle Sawb

a simple, painless tool used to collect loose epithellial cells and DNA from the inside lining of a persons cheek.

Information from blood testing

• Blood is human or non human

• Blood Group

• Weather visible stains do or do not contain blood

DNA

Instructs the bodies cells to make proteins that determine everything from hair color to our susceptivity to disease.

Mitochondrial DNA

• More sensitive than conventional DNA testing

• Cell structure found in all of our cels.

• Power plants of our bodies

• Used in case where DNA is significantly degraded.

How many states mandate the collection of DNA

All 50 states

Evidence that will co oberate that a rape has occured

2-4 vaginal swabs representing vaginal and cervical samples

2 oral swabs

2 anal swabs

2 unstained control swabs

Chemicals used to collect blood samples

Kastle Meyer Color test

Luminol test

Precipitin

Kastle Meyer Color test

Based on the fact that blood hemoglobin possesses peroxidase-like activity

Luminol test

Extremely sensitive capable of detecting blood stains diluted up to 300,000 times

Precipitin

Used to determine if the stain is animal or human

blood examinations aid investigations by

• Locating the possible crime scene

• Discovering the crime

• Identifying weapon used

• Proving or disproving suspects alabi

• Eliminating suspects

Locating the possible crime scene

identification of human blood similar in type to that of the victims can assist investigators in identifying the crime scene

Discovering the crime

Occasionally the identification of human blood on a highway sidewalk porch or in a car is the first indication that a crime has occurred

Identifying the weapon used

the grouping of human blood found in a club, knife, or a hammer can be of considerable value.

Proving or disproving a suspects alabi

the identification of human blood on an item belonging to a suspect who claims that the blood is of animal origin refutes his/her alibi and vice-versa

Eliminating suspects

• The determination that human blood on items from the suspect is different in type from that of the victims may exclude the suspects

• Blood similar to that of the suspects can help corroborate their claim of having a nosebleed or other injury

DNA

Molecules caring the bodys information

Serology

identification and characterization of blood and other bodily fluids on items associated with a crime or crime scene