Aim: How is glass evidence individualized and classified?
Significance of Glass
a. Due to the brittle nature of glass, it is commonly found at crime scenes involving
burglary and hit & run.
b. Small glass particle easily adhere to clothing
What is Forensics?
Forensic derived from Latin: forensic, meaning a public forum where in Roman
times, senators and others debated and held judicial proceedings
Forensic Science means to speak about science.
The application of
Aim: How are fingerprints classified?
1. Used to sign ancient contracts
2. 1880: 1st documented case: Scottish Physician in Japan
3. 1888 Sir Francis Galton, a British anthropologist and a cousin of Charles
Darwin, published a bo
Aim: How does height affect the bloodstain appearance? How does the surface affect the shape
of the bloodstain?
Aim: How is the point of origin determined?
Do Now: What are the flaws in yesterdays experiment?
Measuring tape could be crooked
Aim: What are common types of evidence to search for at crime scene?
Do Now: List as many types of evidence as possible
a. Blood, semen, and saliva, and other body fluids.
g. Firearms a
a. Common type of trace evidence
b. Cannot be individualized microscopically, but may be narrowed to a group which
includes the suspect
c. No property of hair remains consistent through time or is uniform throughout the
body. (High intrasam
Gun Shot Residue(GSR)
a. When a firearm is shot, in addition to the projectile(s), a mass of debris
comes out the muzzle. These gunshot residues (GSR) can include
various primer residues, residues from projectiles, and partially burned
Aim: How does the presumptive test for blood work?
a. Positive substrate and blood
b. Negative substrate only
c. Blank Nothing
If results are both positive or both negative, something is wrong
What to do if your controls dont
Aim: How are Nuclear DNA, Y-DNA, and mitochondrial DNA analyzed?
DNA from parents
a. Y-DNA directly from father
b. Mt. DNA directly from the mother
c. Nuclear DNA crossover between maternal & paternal chromosomes
DNA Structure View
a. DNA c