Is gunpowder good or bad?
Gunpowder was discovered by chance and although it did more harm than good we cannot ignore magnitude by which it affected the human race. As probably all inventions it was used for good and for bad.
Which type of evidence do you think is most useful in an investigation Why?
Answer: I THINK PHYSICAL EVIDENCE IS THE MOST USEFUL IN AN INVESTIGATION BECAUSE IT IS THE MOST BLACK AND WHITE OUT OF ALL THE TYPES OF EVIDENCE. IT’S ONE THING TO LISTEN TO A TESTIMONY OR LOOK AT DOCUMENTS, BUT IT’S ANOTHER THING TO HAVE THE SUSPECT’S DNA AT THE CRIME SCENE.
Are GSR tests reliable?
Reputable scientists always have reported that the finding of GSR cannot indicate the shooter, yet members of the media usually seem surprised to learn that. Nevertheless, GSR findings continue to add value simply because numerous population studies have shown that GSR is not normally found on the average person.
What type of evidence is gunshot residue?
Gunshot residue has been known to be one of the most common and most scrutinized sources of evidence that is examined in violent crime investigations. As previously stated, gunshot residue may be found on either the person who fired the gun, the entrance wound of the victim, or in the surrounding area of the crime.
Does bleach get rid of gunpowder residue?
Bleach will certainly do the trick, but it will leave you with smelly hands. That said, gunshot residue is much more persistent on one’s clothing, especially if the fiber is high in cotton content. The residue in clothing can successfully survive three or more launderings.
What would happen if gunpowder was never invented?
For the world to not have gunpowder, you need to lack the materials to create it. Because if not, someone would invent it at some point anyway. And even lacking the material for gunpowder, you would still find another reactive explosion.
What was the impact of gunpowder?
Their explosive invention would become the basis for almost every weapon used in war from that point on, from fiery arrows to rifles, cannons and grenades. Gunpowder made warfare all over the world very different, affecting the way battles were fought and borders were drawn throughout the Middle Ages.
Are fingerprints direct evidence?
Direct evidence establishes a fact. Examples of direct evidence are eyewitness statements and confessions. An eyewitness may be wrong as much as half the time, but fingerprints and DNA evidence can, more often than not, accurately distinguish the individual in question from the other 7 billion people on Earth.
How long is GSR detectable?
Can gunpowder residue be washed off?
GSR is like talcum powder, and is easily shaken or washed off the hands of the guilty party. In fact, sweat is enough to wash it off – so it moves around easily. GSR is found in most American police cars, police stations and investigation rooms.
Is gunshot residue testing reliable?
Gunshot residue is composed largely of unburnt gunpowder, explosive primer and fragments of bullet or cartridge. The problems with the overall reliability of gunshot residue come not with the testing or identification of its particles, but more with the ease whereby it can be tampered with and altered.
Is gunshot residue class or individual evidence?
Examples of trace evidence include paint, explosive debris, glass, dust and dirt, gunshot residue, blood, and other bodily fluids.
Is gunpowder a renewable resource?
Gunpowder, a.k.a., ‘black powder’ is a mixture of charcoal, sulfur, and potassium nitrate. The oxidizer, potassium nitrate, was typically rendered from urine or feces gathered from horse stables or bat caves, so that’s definitely renewable.
Does shooting a gun leave residue?
After a shooting, traces of gunshot residue on the hands of a suspect are often an extremely important bit of evidence. Small amounts of the rare element antimony are found in most ammunition. When a gun goes off, a cloud of fine particles covers the hands of the shooter – leaving behind a bit of the telltale metal.
What can cause a false positive on a gunshot residue test?
Samples collected from occupations or simulations thereof include welding, pyrotechnics, key cutting, mechanics, and paper products all of which produced significant false positive results for gunshot residue.
Will we ever run out of gunpowder?
Is it possible for the world to run out of gunpowder? No. Gunpowder is not a natural resource that can be depleted. Historically, black powder was made of sulfur, charcoal and potassium nitrate.
What would the world be like without gunpowder?
Basically, without gunpowder, we would still see some form of crossbow as a primary weapon (which would have especially interesting ramifications for the Age of Colonialization). Cars would likely still be invented along with many aspects of modern life, but warfare would much more resemble medieval warfare.
Can a person be found guilty without evidence?
The simple answer is, “no.” You cannot be convicted of a crime without evidence. You cannot be convicted of a federal crime. If there is no evidence against you, under the law, it simply is not possible for the prosecutor’s office to obtain a conviction at trial.
Does peeing on your hands remove gunpowder?
Yes, the urea in urine reacts with the saltpeter in gunpowder and renders it undetectable by the test commonly used for gun shot residue. However, urine smell on you arms is one of the first things cops check for before they do the GSR tests. Any gunshot residue is immediately cleansed.
Where is gunpowder residue most likely to show up on a shooter’s hands?
Gunpowder residue is most likely to show up in the space between the thumb and the index finger on a shooter hands. Explanation: Gunpowder residues are the microscopic particles and other residual materials expelled from a firearm with each shot.
How long does gunpowder residue remain on a shooter’s hands?
Gunshot residue is the consistency of flour and typically only stays on the hands of a living person for 4–6 hours. Wiping the hands on anything, even putting them in and out of pockets can transfer gunshot residue off the hands.
Why would an investigator not pick up a weapon by its barrel with a pencil?
An investigator would not pick up a weapon by its barrel with a pencil or stick in order to protect fingerprints because this may disturb powder deposits, rust, or dirt lodged in the barrel, and consequently may alter the striation markings on test-fired bullets.
How long does gunpowder residue stay on clothes?
Which is more valuable in court class or individual evidence?
Individual evidence can prove something that is material to a crime. Fingerprints are considered to have high probative value because they can belong to only one person. Class evidence does not generally prove a fact, except in cases where it exonerates or eliminates individuals.
What removes gunpowder residue from skin?
As time passes after discharge, GSR particles can be removed from the hands by contact with other objects or by hand washing. After 6-8 hours, analysts would not expect to detect GSR on an active person.
How is gunshot residue detected?
Gunshot residue (GSR) analysis is a standard method to determine if a firearm has been used. Often the primer particles containing lead (Pb), barium (Ba) and antimony (Sb) are detected and analyzed using EDS in a scanning electron microscope.