What tests can be used by forensic scientists to examine crime scene evidence?
Chapter 10: Forensic Sciences
- Physical Matching.
- Fingerprint Matching.
- Hair and fibre analysis.
- Ballistic Analysis.
- Blood Spatter Analysis.
- DNA Analysis.
- Forensic Pathology.
- Chemical Analysis.
What are the different forensic tests?
Here are the top 7:
- Luminol Spray.
- Fingerprint Analysis. …
- Forensic Facial Reconstruction. …
- Polymerase Chain Reaction. …
- Hair Analysis. …
- DNA Sequencer. …
- Ballistics. …
What are four major types of scientific testing conducted by crime laboratories?
Forensic laboratories conduct many different scientific practices including forensic biology, toxicology, controlled substance identification and latent print analysis.
What are some kinds of evidence analyzed in forensic laboratories?
In crime laboratories, scientists analyze evidence collected from crime scenes, suspects and victims. They may analyze anything from DNA or fingerprints to human remains or suspicious substances.
How is a substance tested to determine if it is blood?
Method. A presumed blood sample is first collected with a swab. A drop of phenolphthalein reagent is added to the sample, and after a few seconds, a drop of hydrogen peroxide is applied to the swab. If the swab turns pink rapidly, it is said to test presumptive positive for blood.
What kind of tests are performed at a crime scene to determine if blood is present?
The luminol reaction is at best a presumptive test for blood. If the stain is so dilute that it can only be visualized with luminol, then no further analysis can be performed to confirm the presence of blood.
What are the 4 types of evidence?
Generally speaking, there are four main kinds of evidence. These are testimonial, documentary, demonstrative, and what’s called real evidence.
What are the 5 reasons physical evidence is valuable?
hair, fingerprints, blood, impressions, fiber, etc.
Terms in this set (39)
- Nature of the offense, and the situation in which the crime is observed (unbiased, bystander, involved, victim)
- Characteristics of the witness (are they credible?)
- Manner in which the information is retrieved (What did the cop say?)
What are the five common types of evidence?
And even some evidence that is not admissible on its own may be admissible in conjunction with other types of evidence.
- Analogical Evidence. …
- Anecdotal Evidence. …
- Character Evidence. …
- Circumstantial Evidence. …
- Demonstrative Evidence. …
- Digital Evidence. …
- Direct Evidence. …
- Documentary Evidence.
Which unit is responsible for the examination of body fluids?
The toxicology unit often supports the work of the medical examiner and may be located within that office. Forensic toxicologists evaluate organs and bodily fluids to determine the presence of any substances that could have caused or contributed to death, such as drugs or poisons.
What are the 3 major crime labs within the Department of Justice?
The Department of Justice maintains forensic laboratories at the Bureau of Alcohol, Tobacco, Firearms, and Explosives, the Drug Enforcement Administration, and the Federal Bureau of Investigation.
What is Franzik test?
ISLAMABAD: What is forensic test of an audio-video recording? … According to Wikipedia, forensic identification is the application of forensic science, or “forensics”, and technology to identify specific objects from the trace evidence they leave, often at a crime scene or the scene of an accident.
What are the 7 types of evidence?
Terms in this set (7)
- Personal Experience. To use an event that happened in your life to explain or support a claim.
- Statistics/Research/Known Facts. To use accurate data to support your claim.
- Allusions. …
- Examples. …
- Authority. …
- Analogy. …
- Hypothetical Situations.
What are the 2 main types of evidence?
There are two types of evidence — direct and circumstantial. Direct evidence usually is that which speaks for itself: eyewitness accounts, a confession, or a weapon.
What is type of evidence?
Types of legal evidence include testimony, documentary evidence, and physical evidence. … Scientific evidence consists of observations and experimental results that serve to support, refute, or modify a scientific hypothesis or theory, when collected and interpreted in accordance with the scientific method.