Crime Scene and Chain of Custody
True or False: An evidence log and a chain of custody must be attached to the evidence container.
True
True or false: Most wrongful convictions are the result of faulty eyewitness observation and testimony
True
DNA is cut at specific base pair sequences by
d) Restriction enzymes
An individual’s DNA can be found in the _____________ of the hair.
a. the follicle
b. the cortex
c. in the medulla
d. the shaft
(a) the follicle
Blood component that carries oxygen and CO2
b) Red blood cells
The location where the crime took place is known as _____________________ and the location of evidence reasonably related to the crime scene is known as _______________________
d) Primary crime scene; secondary crime scene
All of the following are ways to improve our observational skills except:
(c) When collecting evidence, record only those things that you are sure are important
When running a gel electrophoresis, DNA will migrate towards the ________ end because DNA has a _________ charge.
b) positive, negative
Hair can be considered which of the following types of evidence?
a. class evidence and individual evidence
b. direct evidence, circumstantial evidence and trace evidence
c. trace evidence and direct evidence
d. individual evidence, trace evidence and class evidence
d. Individual evidence, trace evidence, and class evidence.
Blood component that contains DNA and is involved in fighting infection
a) White blood cells
Whenever two people come in contact with each other or another surface, a physical transfer of evidence occurs. This transfer of physical evidence, which can result in contamination or lost evidence, is known as:
(b) Locard's exchange principle
The Innocence Project found that most faulty convictions were based on
(c) Inaccurate eyewitness accounts
Which of these is correct according to DNA base pairing rules?
a) A = T
What part of the hair is used when scientist are testing for drugs, toxins or other heavy metals?
a. the cuticle
b. the cortex
c. the medulla
d. the papilla
a. the cuticle
Blood component that is involved in clotting and injury repair:
d) Platelets
The reason it is important to separate witnesses at the crime scene is to
a. Prevent contamination of the evidence – witnesses may want to make sure they don’t become suspects
b. Prevent fighting among the witnesses
c. Protect them from potential suspects
d. Prevent the witnesses from talking to each other and creating a false story
D. Prevent the witnesses from talking to each other and creating a false story
The first task of forensic scientists is to:
What evidence that could be found at a crime scene would contain DNA?
c) Blood
Which of the following is the least common fingerprint ridge pattern?
a. Arched pattern
b. Plain Whorl
c. Loop fingerprint
d. Latent fingerprint
a. Arched pattern
What characteristic will a blood droplet that fell at an angle of impact of 90 degrees (directly vertical to the surface) exhibit?
d) Approximately circular in shape
Direct evidence includes
(c) First-hand observations such as eyewitness accounts or video surveillance
The Innocence Project at the Benjamin N. Cardozo School of Law was created by Barry C. Scheck and Peter J. Neufeld in 1992. Its purpose was to reexamine post-conviction cases (individuals convicted and in prison) using:
a) DNA evidence to provide conclusive proof of innocence
Free response: What is the difference between DNA testing for paternity vs. DNA testing for crime scene suspects?
The main categories of fingerprint ridge patterns are:
a. Double loop and plain
b. Plain arch, central pocket, and radial loop
c. Loops, arches and whorls
d. tented , accidental, double loop
c. loops, arches, and whorls
Generally, bloodstain diameter or size _____________________ as height increases
b) Increases