Forensic Science

Published in Forensic Science
Monday, 04 September 2017 16:36
Forensic science is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal procedure.
 
Forensic scientists collect, preserve, and analyze scientific evidence during the course of an investigation. While some forensic scientists travel to the scene of the crime to collect the evidence themselves, others occupy a laboratory role, performing analysis on objects brought to them by other individuals.
 
In addition to their laboratory role, forensic scientists testify as expert witnesses in both criminal and civil cases and can work for either the prosecution or the defense. While any field could technically be forensic, certain sections have developed over time to encompass the majority of forensically related cases.

EXAMINATION FOR THE PRESENCE OF SEMEN IN MEDICOLEGAL CASES

Published in Forensic Pathology
Sunday, 13 August 2017 17:08
This includes examination of material obtained from vagina, stains from clothing, skin, hair, or other body parts for semen. This is carried out in cases of alleged rape or sexual assault.
 
Collection of Sample
 
  • Vagina: Direct aspiration or saline lavage
  • Clothing: When scanned with ultraviolet light, semen produces green white fluorescence. A small piece (1 m2) of clothing from stained portion is soaked in 1-2 ml of physiologic saline for 1 hour. A similar piece of clothing distant from the stain is also soaked in saline as a control.

LABORATORY PROCEDURES
 
1. MICROSCOPIC EXAMINATION FOR SPERMS
 
Presence of motile sperms in vaginal fluid indicates interval of < 8 hours. Smears prepared from collected samples are stained and examined for the presence of sperms.
 
2. ACID PHOSPHATASE
 
Acid phosphatase is determined on vaginal or clothing samples. Due to the high level of acid phosphatase in semen, its presence indicates recent sexual intercourse. Level of ≥50 U/sample is considered as positive evidence of semen.
 
3. DETERMINATION OF BLOOD GROUP SUBSTANCES
 
When semen is positively identified in vaginal fluid or other sample, test can be carried out for the presence of blood group substances in the same sample. The ‘secretor’ individuals (80% individuals are secretors) will secrete the blood group substances in body fluids, including semen.
 
4. FLORENCE TEST
 
This test detects the presence of choline found in high concentration in semen. To several drops of sample, add equal volume of reagent (iodine 2.54 g, potassium iodide 1.65 g, distilled water 30 ml); in positive test rhombic or needle-like crystals of periodide of choline form. False-positive tests can occur due to high choline content of some other body fluids.

Color Atlas of Forensic Medicine and Pathology

Published in Downloads
Saturday, 07 May 2016 00:27
Description: New York City has the largest medical examiner’s office in the United States, and the Brooklyn division is the busiest of the five boroughs. Charles A. Catanese received his Forensic Pathology fellowship training in New York, and then worked full time as a Medical Examiner in the Brooklyn office for more than 10 years. He has personally performed more than 4000 autopsies, including over 400 homicides.

Dr. Catanese has worked through several disasters, including TWA Flight 800, AA Flight 587, and more than nine months on the World Trade Center fatalities. He is currently the Chief Medical Examiner of Orange County, New York. Drawing on his wealth of knowledge and experience in solving some of the most difficult cases a forensic examiner could encounter, he assembles hundreds of images from his own work experience to present the Color Atlas of Forensic Medicine and Pathology.

Forensic Pathology Principles and Practice, 1st Edition - 2005

Published in Downloads
Tuesday, 26 April 2016 01:01
Description: Forensic Pathology: Principles and Practice is an extensively illustrated reference book that contains more than 1800 color photographs accompanied by well-considered text that thoroughly explains representative topics, and also provides abundant, up-to-date references for further reading. This well-written volume uses a case-oriented format to address, explain and guide the reader through the varied topics encountered by forensic pathologists. It will benefit not only the experienced forensic pathologist, but also the hospital pathologist who occasionally performs medicolegal autopsies. Doctors in training and those law enforcement officials investigating the broad spectrum of sudden, unexpected and violent deaths that may fall within the jurisdiction of medicolegal death investigators will also find this an invaluable resource.
  • Large, colorful photographs which beautifully illustrate the concepts outlined in the text.
  • Sample descriptions of pathological lesions which serve to aid pathologists in reporting their findings to law enforcement agencies, attorneys, and others involved in investigations of sudden death.
  • Do and Don't' sections at the end of each chapter which provide guidance for handling the types of cases examined within preceding sections.

Forensic Pathology for Police Death Investigators Attorneys and Forensic Scientists 2010

Published in Downloads
Tuesday, 26 April 2016 00:51
Description: Forensic Pathology for Police, Death Investigators, Attorneys, and Forensic Scientists is a forensic pathology book specifically written for professionals who interact with forensic pathologists. The book includes sections that address various general topics which are not normally present in the typical forensic pathology text, such as descriptions of medical, pathology and forensic pathology training, basic anatomy and physiology, an overview of other forensic science disciplines, and autopsy performance. Forensic Pathology for Police, Death Investigators, Attorneys, and Forensic Scientists also covers classic topics in forensic pathology, including death investigation, death certification, postmortem changes, and the entire range of case types, ranging from natural deaths to drug-related deaths to various types of violent death. The text is written in easy-to-understand language, and is complemented by hundreds of high-quality photographs. As an added bonus, a CD containing color versions of all of the photographs shown in the text, as well as hundreds of additional color photographs, is included.
Advertisement

Useful Sites

  • NCBI

    National Center for Biotechnology Information
  • LTO

    Lab Tests Online® by AACC
  • ASCP

    American Society for Clinical Pathology
  • ASM

    American Society for Microbiology
  • The Medical Library®

    Project of BioScience.pk
Advertisement

Connect With Us

Contact Us

All comments and suggestions about this web site are very welcome and a valuable source of information for us. Thanks!

Tel: +(92) 302 970 8985-6

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Website: https://www.bioscience.pk



This website is certified by Health On the Net Foundation. Click to verify. This site complies with the HONcode standard for trustworthy health information:
verify here.

Our Sponsors

InsightGadgets.comPathLabStudyTheMedicalLibrary.orgThe Physio ClubB2BPakistan.com

By using BioScience.pk you agree to our use of cookies to enhance your experience on this website.