Table of Contents
- 1 What did we do before plastic bags?
- 2 Why is evidence placed in a paper bag instead of plastic?
- 3 Why are plastic bags considered to be evidence at a crime scene?
- 4 What did we use before plastic was invented?
- 5 What evidence goes into a plastic bag?
- 6 What are three ways investigators use evidence collected at a crime scene?
- 7 How do you fill out an evidence bag?
- 8 What was used before plastic?
- 9 What did we use before plastic?
- 10 What type of Evidence packaging do I need for my case?
- 11 How did the invention of plastic bags change the world?
What did we do before plastic bags?
Before plastic bags, there was paper. Paper bags worked but they were not easy to carry and they weren’t nearly as strong as plastic. paper was more expensive to produce than plastic. The plastic bag not only made life easier for the consumer, it also saved retailers money.
Why is evidence placed in a paper bag instead of plastic?
Each item is placed in a separate paper bag to prevent cross-contamination. Plastic bags are not used because moisture can collect within the bag and alter the evidence (Figure 3). Do not remove attached hairs or fibers from clothing.
What are evidence bags called?
Clean zipper storage bags are also used: special security bags or “evidence bags” have built-in security and tamper-indicating features. Knives are best suited to packing in corrugated boxes so the blade does not cut the package or people.
Why are plastic bags considered to be evidence at a crime scene?
While these bags are typically designed to provide consumers with ease and convenience, they are often used by criminals in the course of committing more sinister acts, such as homicide, drug trafficking, robbery, and kidnapping.
What did we use before plastic was invented?
Before the invention of plastic, the only substances that could be molded were clays (pottery) and glass. Hardened clay and glass were used for storage, but they were heavy and brittle. Some natural substances, like tree gums and rubber, were sticky and moldable.
When were plastic bags invented?
1965
Sten Gustaf Thulin, a Swedish engineer, invented the modern-day plastic bag in 1965. Thulin officially introduced the bag to the world after a packaging company he worked for, Celloplast, made it available to the marketplace.
What evidence goes into a plastic bag?
Paper or Plastic? There’s a simple rule of thumb for deciding which type of evidence packaging—wet evidence goes in paper containers (wet evidence can degrade if placed inside plastic containers) and dry evidence goes in plastic. Items that could be cross-contaminated must be packaged separately.
What are three ways investigators use evidence collected at a crime scene?
List three ways investigators use evidence collected at a crime scene.
- May prove that a crime has been committed.
- Establish any key elements of a crime.
- Link a suspect with a crime scene or a victim.
- Establish the identity of a victim or suspect.
- Corroborate verbal witness testimony.
- Exonerate the innocent.
What evidence is stored in a plastic bag?
One example of when clear plastic evidence bags are the preferred method of storage is for fingerprints on absorbent materials. After photographing the surface with fingerprints, place the absorbent material in a plastic bag and then label and seal it with the date, your name, description, and exhibit number.
How do you fill out an evidence bag?
- Wrapping & Packing: Place on waxed paper or cellophane. Pack in pill or powder box, paper container or druggist’s fold.
- Identification: Label or tag on outside of container. Show type of material, date obtained, CSI or investigator’s initials, case name and number.
- Amount Desired: Standard – 1 oz. liquid. ¼ cup solid.
What was used before plastic?
What was used before plastic wrap?
Wax paper was frequently used in the decades before plastic wrap was stocked on supermarket shelves, and it’s a reusable form of wax paper that’s now offering an alternative to throwaway plastics. Bee’s Wrap is made by coating bee’s wax, jojoba oil, and tree resin onto a thin strip of cotton.
What did we use before plastic?
We used paper for packaging things that did not require plastic in the first place We used cloth bags and other civilized things for carrying most things around Where fluid transportation was involved, we used metal containers.
What type of Evidence packaging do I need for my case?
There’s a simple rule of thumb for deciding which type of evidence packaging—wet evidence goes in paper containers (wet evidence can degrade if placed inside plastic containers) and dry evidence goes in plastic. Items that could be cross-contaminated must be packaged separately.
Why are disposable plastic bags so popular?
Disposable plastic bags became so popular so fast mainly because of their convenience. Before plastic bags, there was paper. Paper bags worked but they were not easy to carry and they weren’t nearly as strong as plastic. The most important part… paper was more expensive to produce than plastic.
How did the invention of plastic bags change the world?
High density polyethylene was the “breakthrough” that enabled the production of cheap, yet strong plastic bags. This seemingly simple invention changed the way we shop and had unimaginable consequences for our natural environment. 1933 – Polyethylene (the most common type of plastic used for disposable bags) is invented.