Notice: Payments for answers will end 4/10/2017. Click for more info.
You have new items in your feed. Click to view.
Question and answer
Q: what are some key steps in securing and identifying both physical and biological evidence at a crime scene?
A: A successful crime investigation depends upon the collection and analysis of various kinds of evidence. Forensic scientists classify evidence in different ways and have specific ways of dealing with it. [ One major distinction is between physical and biological evidence. Physical evidence refers to any item that comes from a nonliving origin, while biological evidence always originates from a
living being. The most important kinds of physical evidence are fingerprints, tire marks, footprints, fibers, paint, and building materials. Biological evidence includes bloodstains and DNA. Locard's Exchange Principle dictates that evidence, both physical and biological, is to be found at the scene of a crime because the perpetrator always leaves something behind by having contact with victims and objects there. Similarly, he or she will often take something away with them, which can be found on a search of their person, their garment, a vehicle, or their premises. Such evidence is often found in minute quantities and known as trace evidence. One important source of physical trace evidence is textile fibers, which usually comes from clothing or furniture involved in the crime. It may either be left behind by the perpetrator or picked up from the victim. Typically, trace evidence is invisible to the naked eye and is collected by brushing or vacuuming a suspect surface. Once collected and back in the laboratory, microscopic techniques will often be used in its examination and analysis as, for example, in the case of paint fragments or textile fibers. ]
Expert answered|bJhmze|Points 90|
Asked 10/30/2012 2:24:15 AM
0 Answers/Comments
Get an answer
New answers

There are no new answers.


There are no comments.

Add an answer or comment
Log in or sign up first.
26,576,977 questions answered
Popular Conversations
6. Solve the equation. Show your work. Check your answer. 3x – 7 = 5x ...
Weegy: 3x – 7 = 5x + 19 , 3x - 5x = 19+7, -2x = 26, - x=26/2, x=-13
1/10/2018 8:46:51 AM| 3 Answers
9/11= /22
Weegy: Multiply the numerator of the first fraction by the denominator of the second fraction. Set this equal to the ...
1/10/2018 4:50:25 PM| 3 Answers
Simplify this expression: 19 – (–8) – (–14) = ? A. 25 ...
Weegy: 19 ? (?8) ? (?14)
1/15/2018 10:29:20 PM| 2 Answers
Cells are the basic of our bodies.
Weegy: Cells are the basic of our bodies. TRUE
1/10/2018 7:36:07 AM| 2 Answers
An informal meeting with a person who works in a career that ...
Weegy: An informal meeting with a person who works in a career that interests you is known as a Informational ...
1/10/2018 11:01:28 AM| 2 Answers
Which of the following is an example of a long-term climatic change? ...
Weegy: Ice age is an example of a long-term climatic change. User: In what times of year are tropical cyclones most ...
1/18/2018 8:30:25 PM| 2 Answers
Is lively an adverb
1/11/2018 6:42:37 PM| 2 Answers
Weegy Stuff
Points 533 [Total 825] Ratings 1 Comments 523 Invitations 0 Online
Points 74 [Total 4525] Ratings 0 Comments 34 Invitations 4 Offline
Points 65 [Total 183] Ratings 0 Comments 65 Invitations 0 Offline
Points 17 [Total 17] Ratings 0 Comments 17 Invitations 0 Offline
Points 10 [Total 10] Ratings 0 Comments 0 Invitations 1 Offline
Points 5 [Total 44] Ratings 0 Comments 5 Invitations 0 Offline
Points 3 [Total 3] Ratings 0 Comments 3 Invitations 0 Offline
Points 2 [Total 2] Ratings 0 Comments 2 Invitations 0 Offline
Points 1 [Total 2] Ratings 0 Comments 1 Invitations 0 Offline
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.