Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Blowfly maggots provide physical evidence for forensic cases

02.09.2014

Evidence collected from blowfly maggots could help in the investigation in murder cases.

Estimation of the post mortem interval (PMI) is one of the most crucial matters in autopsies and entomological specimens have been widely used to determine PMI after 72 hours of death. This is done using the oldest blowfly larvae found and from the succession pattern of insects that colonize the dead remains. Thus, the use of blowflies in forensic cases are crucial.


Chrysomya megacephala - a common blowfly in Malaysia

The most common blowflies in Malaysia are Chrysomya megacephala and Aechotandrus rufifacies. Blowflies arrive and deposit their eggs on a dead body within minutes of death occuring as the odour released from the carcass attracts them.

The eggs then grow to feeding larvae, which feed on the dead remains until they reach maturity. Larvae that feed on the tissues of an individual who took drugs or was poisoned will ingest these substances as well as their metabolites, proving that the drugs had accumulated in the body.

Some criminal cases involve the use of firearms. The forensic investigation of such cases requires physical evidence to be collected at the scene of the crime. In extreme conditions, when the bullet case is not found and the dead body is actively decomposing, blowfly maggots obtained from the dead remains hold potential clues in aiding the forensic investigation.

Our laboratory studied the presence of several different types of toxins, including malathion, paraquat, gasoline, paracetamol and ketum extracts, along with gunshot residue (GSR), to determine the effects of these toxins and GSR in the development rates of the blowfly species, Chrysomya megacephala and Aechotandrus rufifacies. Our aim was to determine whether the presence of toxins may affect the estimation of PMI. We were also exploring the potential of blowfly samples to be applied in forensic investigations for detecting toxins and GSR.

Our results showed that the presence of malathion, paraquat, gasoline, paracetamol, ketum extracts and GSR affected the development rates of blowflies. In real intoxication and shooting cases involving decomposed remains, estimation of the correct PMI using larvae samples should consider the delayed and accelerated duration on the development of the blowflies. We also found the presence of active components of toxins in the blowfly samples we studied, proving the potential of blowfly samples to be tested in investigations to identify toxins in the victim’s body.

In conclusion, the blowfly species, C. megacephala and A. rufifacies, can provide crucial and important physical evidence in forensic investigations.

For further information contact

Rumiza Abd Rashid
Faculty of Applied Science
University Teknologi MARA
Malaysia
Email: rumiza9550@salam.uitm.edu.my

Darmarajah Nadarajah | Research SEA News
Further information:
http://inforec.uitm.edu.my
http://www.researchsea.com

Further reports about: Teknologi UiTM drugs eggs evidence forensic gasoline investigations larvae malathion species toxins

More articles from Life Sciences:

nachricht Fish Oil-Diet Benefits May be Mediated by Gut Microbes
28.08.2015 | University of Gothenburg

nachricht Bio-fabrication of Artificial Blood Vessels with Laser Light
28.08.2015 | Fraunhofer-Institut für Lasertechnik ILT

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: OU astrophysicist and collaborators find supermassive black holes in quasar nearest Earth

A University of Oklahoma astrophysicist and his Chinese collaborator have found two supermassive black holes in Markarian 231, the nearest quasar to Earth, using observations from NASA's Hubble Space Telescope.

The discovery of two supermassive black holes--one larger one and a second, smaller one--are evidence of a binary black hole and suggests that supermassive...

Im Focus: What would a tsunami in the Mediterranean look like?

A team of European researchers have developed a model to simulate the impact of tsunamis generated by earthquakes and applied it to the Eastern Mediterranean. The results show how tsunami waves could hit and inundate coastal areas in southern Italy and Greece. The study is published today (27 August) in Ocean Science, an open access journal of the European Geosciences Union (EGU).

Though not as frequent as in the Pacific and Indian oceans, tsunamis also occur in the Mediterranean, mainly due to earthquakes generated when the African...

Im Focus: Self-healing landscape: landslides after earthquake

In mountainous regions earthquakes often cause strong landslides, which can be exacerbated by heavy rain. However, after an initial increase, the frequency of these mass wasting events, often enormous and dangerous, declines, in fact independently of meteorological events and aftershocks.

These new findings are presented by a German-Franco-Japanese team of geoscientists in the current issue of the journal Geology, under the lead of the GFZ...

Im Focus: FIC Proteins Send Bacteria Into Hibernation

Bacteria do not cease to amaze us with their survival strategies. A research team from the University of Basel's Biozentrum has now discovered how bacteria enter a sleep mode using a so-called FIC toxin. In the current issue of “Cell Reports”, the scientists describe the mechanism of action and also explain why their discovery provides new insights into the evolution of pathogens.

For many poisons there are antidotes which neutralize their toxic effect. Toxin-antitoxin systems in bacteria work in a similar manner: As long as a cell...

Im Focus: Fraunhofer IPA develops prototype of intelligent care cart

It comes when called, bringing care utensils with it and recording how they are used: Fraunhofer IPA is developing an intelligent care cart that provides care staff with physical and informational support in their day-to-day work. The scientists at Fraunhofer IPA have now completed a first prototype. In doing so, they are continuing in their efforts to improve working conditions in the care sector and are developing solutions designed to address the challenges of demographic change.

Technical assistance systems can improve the difficult working conditions in residential nursing homes and hospitals by helping the staff in their work and...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Networking conference in Heidelberg for outstanding mathematicians and computer scientists

20.08.2015 | Event News

Scientists meet in Münster for the world’s largest Chitin und Chitosan Conference

20.08.2015 | Event News

Large agribusiness management strategies

19.08.2015 | Event News

 
Latest News

Interstellar seeds could create oases of life

28.08.2015 | Physics and Astronomy

An ounce of prevention: Research advances on 'scourge' of transplant wards

28.08.2015 | Health and Medicine

Fish Oil-Diet Benefits May be Mediated by Gut Microbes

28.08.2015 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>