What are some of the challenges for forensic scientists in dealing with fiber evidence? Trace evidence, like fiber, can be easy to miss because of its size, and can be hard to package because of its material. It is also easy to lose.
What are some of the challenges for forensic scientists in dealing with fiber evidence What does it mean if a paint sample matches a known sample from a vehicle does this indicate the same source Why or why not why are microscopes important to forensic scientists how does trace evidence end up transferring to the crime?
If a paint chip were to match a paint chip from a known sample, there is only a 1 in 33,000 chance that the paint chip came from another vehicle. … Microscopes are crucial to forensic scientists for one main reason: the miniscule nature of so many of the samples they collect.
What is the current weakness of forensic science when dealing with evidence?
What is the main reason for this weakness? The greatest weakness of class physical evidence is that it cannot relate physical evidence to a common origin with a high degree of certainty. Evidence possessing class characteristics can be associated only with a group and never with a single source.
Why is fiber evidence not considered reliable evidence?
Likewise, fibers obtained from victims clothes or in the area of the crime scene can guide investigators in the direction of a particular suspect. … A caution, however, is that fiber evidence unlike DNA is not unique. It can not definitively identify a suspect but it can serve to narrow the field of potential suspects.
What would increase the probative value of natural fiber evidence?
What would increase the probative value of natural fiber evidence? The identification of less common plant or animal fibers at a crime scene or on the clothing of a suspect or victim would have increased significance. 7.
What else can influence the significance of fiber evidence?
The wide variety of fiber types, fiber colors, and fabric types can make fiber associations very significant because the value of a fiber association depends on the type of fiber, the color of the fiber, the number of fibers transferred, the location of the recovered fibers, and other factors.
Is it dangerous to be a forensic scientist?
While some forensic technicians work primarily in the lab, others routinely visit crime scenes to collect and document evidence. Because many crime scenes are outdoors, forensic technicians may be exposed to hazardous weather conditions such as extreme heat or cold, snow, rain, or even damaging winds.
Are forensic scientists paid well?
Forensic science technicians make a median yearly salary of $56,750 as of May 2016, and the bottom half of them can expect to earn less pay and the top half more pay. … For the bottom 10 percent, these forensic science technicians get paid less than $33,860, while the top 10 percent earn much more at $97,400 annually.
What is the greatest weakness of class physical evidence?
The greatest weakness of class physical evidence is that it cannot relate physical evidence to a common origin with a high degree of certainty. Evidence possessing class characteristics can be associated only with a group and never with a single source.
What is physical evidence list some examples?
Physical evidence encompasses any and all objects that can establish that a crime has been committed or can link a crime an it’s victim or it’s perpetrator. Examples include hair, skin, fibers, fingerprints, blood, DNA, weapons, soil, glass, and documents.
What are some of the issues with evidence at a crime scene?
Lack of preparation in approaching and entering the crime scene. Proper handling of evidence and a robust chain of custody. These are basic requirements for evidence preservation. Many cold cases are no longer accessible as the evidence has been mishandled.
What are five sources of fiber forensics?
Fibers can be natural (derived from plants and animals) or synthetic (man-made). Plant-based fibers include cotton, flax, jute, and hemp. The most common animal fiber is sheep wool, but this category could include fibers from other animals, including mohair, cashmere, alpaca, and camel.
What crimes use fiber evidence?
Before Wayne Williams became a suspect, the Georgia State Crime Laboratory located a number of yellowish-green nylon fibers and some violet acetate fibers on the bodies of victims murdered in the Atlanta area. The fibers appeared to have a common source.
Can fiber evidence have probative value?
Fiber evidence can have probative value. a piece of fabric can be individualized to a particular garment. A fiber can be individualized to a particular piece of fabric. … Optical microscopy is one of the most important methods of fiber identification.