Saturday, October 27, 2018

USE OF SCIENTIFIC INVESTIGATIVE TECHNIQUES IN CRIME INVESTIGATION


Hon’ble  Supreme Court while disposing off the Criminal Appeal  Dharamdeo Yadav vs State of U.P. (2014) 5 SCC 509 which relates with the murder of Diana Routley a citizen of Newzeland who came to India as tourist went to Varanasi and disappeared.  FIR was lodged and investigation started. During the investigation accused were arrested and under section 27 Evidence Act , skeleton was recovered. Since there was no eye witness to the seen of crime the whole case was based on Circumstantial Evidence. In order to establish the identity of skeleton of deceased  Photo Super Imposition Technique and DNA  Fingerprinting was  used. Based on last seen theory , and  other scientific and circumstantial evidence the Supreme Court commuted the death sentence of accused  into life imprisonment.

The Hon’ble Supreme Court while emphasizing on the use of Modern Scientific Techniques observed “

CRIME SCENE MANAGEMENT

“Crime scene has to be scientifically dealt with without any error. In criminal cases, especially based on circumstantial evidence, forensic science plays a pivotal role, which may assist in establishing the element of crime, identifying the suspect, ascertaining the guilt or innocence of the accused. One of the major activities of the Investigating officer at the crime scene is to make thorough search for potential evidence that have probative value in the crime. Investigating Officer may be guarded against potential contamination of physical evidence which can grow at the crime scene during collection, packing and forwarding. Proper precaution has to be taken to preserve evidence and also against any attempt to tamper with the material or causing any contamination or damage.”

EXPERT SCIENTIFIC EVIDENCE

Criminal Judicial System is this country is at cross-roads, many a times, reliable, trustworthy, credible witnesses to the crime seldom come forward to depose before the court and even the hardened criminals get away from the clutches of law. Even the reliable witnesses for the prosecution turn hostile due to intimidation, fear and host of other reasons. Investigating agency has, therefore, to look for other ways and means to improve the quality of investigation, which can only be through the collection of scientific evidence.

In this age of science, we have to build legal foundations that are sound in science as well as in law. Practices and principles that served in the past, now people think, must give way to innovative and creative methods, if we want to save our criminal justice system. Emerging new types of crimes and their level of sophistication, the traditional methods and tools have become outdated, hence the necessity to strengthen the forensic science for crime detection.

Oral evidence depends on several facts, like power of observation, humiliation, external influence, forgetfulness etc., whereas forensic evidence is free from those infirmities. Judiciary should also be equipped to understand and deal with such scientific materials. Constant interaction of Judges with scientists, engineers would promote and widen their knowledge to deal with such scientific evidence and to effectively deal with criminal cases based on scientific evidence. We are not advocating that, in all cases, the scientific evidence is the sure test, but only emphasizing the necessity of promoting scientific evidence also to detect and prove crimes over and above the other evidence.

Scientific evidence encompasses the so-called hard science, such as physics, chemistry, mathematics, biology and soft science, such as economics, psychology and sociology. Opinions are gathered from persons with scientific, technical or other specialized knowledge, whose skill, experience, training or education may assist the Court to understand the evidence or determine the fact in issue. Many a times, the Court has to deal with circumstantial evidence and scientific and technical evidence often plays a pivotal role. Sir Francis Bacon, Lord Chancellor of England, in his Magnum Opus put forth the first theory of scientific method. Bacons view was that a scientist should be disinterested observer of nature, collecting observations with a mind cleansed of harmful preconceptions, that might cause error to creep into the scientific record. Distancing themselves from the theory of Bacon, the US Supreme Court in Daubert v. Merrell Dow Pharmaceuticals, Inc. 509 U.S. 579 (1993) held as follows:-

Science is not an encyclopedic body of knowledge about the universe. Instead, it represents a process for proposing and refining theoretical explanations about the world that are subject to further testing and refinement.

PHOTOGRAPHY SUPERIMPOSITION
Personal Identification or Uniqueness of Individual:-

Superimposition Technique:- for personal identification superimposition technique was done in this case, for which photograph of face of alleged individual Diana Clare Routley obtained from S.S.P. Varanasi (Ex.1) from which a black and white photograph (Ex.2) was made the skull and mandible was fixed in best position anatomical position and photograph of skull along with Mandible was taken (Ex.3) by minutely adjusting same angle and distance from which photograph of face (Ex.2) was taken.

The negative of photograph (Ex.2) and negative of skull (Ex.3) was precisely adjusted in stand in dark room for registration marks then sumporim posed photograph was taken first partially exposing negative of photograph on photograph paper then exposing negative of skull on the same photograph thus the superimposed photograph (Ex.4) was obtained and registration marks and lines were compared and was found that they matched and coincided exactly establishing that the skull belonged to the photograph of the individual. (Annexure Ex.1 to Ex. 4 for perusal).

Personal Identification by comparison of Dental Records of alleged individual from Dental findings of bones; Dental records of Diana Clare Routley (Ex.5) the alleged individual was made available by S.S.P. Varanasi with the help of Interpol services

(a) in the lower jaw there was evidence eruption of III Molar both sides, but the teeth were missing. The dental record shows that both the lower III Molar were extracted on 8.3.1993

(b) the upper III Molar both sides teeth was not present and no sign of eruption was seen. The X-ray (Dental) (Ex.6) of Diana Clare Routely shows that both upper III Molar were not erupted/impacted.

(c) The examination of teeth and hair X-ray (taken in S.S.P.G. Hospital) (Report Ex.6) shows that there are cavities and filling in the upper left II Molar, upper right 1st Molar, lower left Molar and lower right II Molar, also small cavity in the Ist Molar lower both sides. The dental chart (Ex.5) and Dental X-ray (Ex.7) of Diana also show presence of cavity and fillings in these teeth. Thus comparison of teeth and their X-ray with the dental and their X-ray records from New Zealand of Diana completely establishes the identity of skull and mandible of being Diana Clare Routley.

(d) Blood group was detected from bones and was found Group-A. Medical report shows Blood Group-A.

DNA FINGERPRINTING

We are in this case concerned with the acceptability of the DNA report, the author of which (PW21) was the Chief of DNA Printing Lab, CDFD, Hyderabad.

The qualifications or expertise of PW21 was never in doubt. The method he adopted for DNA testing was STR analysis. Post-mortem examination of the body remains (skeleton) of Diana was conducted by Dr. C.B. Tripathi, Professor and Head of Department of Forensic Medical I.M.S., B.H.U., Varanasi. For DNA analysis, one femur and one humerus bones were preserved so as to compare with blood samples of Allen Jack Routley. In cases where skeleton is left, the bones and teeth make a very important source of DNA. Teeth, as often noticed is an excellent source of DNA, as it forms a natural barrier against exogenous DNA contamination and are resistant to environmental assaults.

The blood sample of the father of Diana was taken in accordance with the set up precept and procedure for DNA isolation test and the same was sent along with taken out femur and humerus bones of recovered skeleton to the Centre for D.N.A. Fingerprinting and Diagnostics (CDFD), Ministry of Science and Technology, Government of India, Hyderabad. PW21, as already indicated, conducted the DNA Isolation test on the basis of samples of blood of Routley and femur and humerus bones of skeleton and submitted his report dated 28.10.1998. DNA Fingerprinting analysis was carried out by STR analysis and on comparison of STR profile of Routley. When DNA profile of sample found at the scene of crime matches with DNA profile of the father, it can be concluded that both the samples are biologically the same


The DNA stands for deoxyribonucleic acid, which is the biological blueprint of every life. DNA is made-up of a double standard structure consisting of a deoxyribose sugar and phosphate backbone, cross-linked with two types of nucleic acids referred to as adenine and guanine, purines and thymine and cytosine pyrimidines.

The most important role of DNA profile is in the identification, such as an individual and his blood relations such as mother, father, brother, and so on. Successful identification of skeleton remains can also be performed by DNA profiling. DNA usually can be obtained from any biological material such as blood, semen, saliva, hair, skin, bones, etc.

The question as to whether DNA tests are virtually infallible may be a moot question, but the fact remains that such test has come to stay and is being used extensively in the investigation of crimes and the Court often accepts the views of the experts, especially when cases rest on circumstantial evidence. More than half a century, samples of human DNA began to be used in the criminal justice system. Of course, debate lingers over the safeguards that should be required in testing samples and in presenting the evidence in Court. DNA profile, however, is consistently held to be valid and reliable, but of course, it depends on the quality control and quality assurance procedures in the laboratory. Close relatives have more genes in common than individuals and various procedures have been proposed for dealing with a possibility that true source of forensic DNA is of close relative.

So far as this case is concerned, the DNA sample got from the skeleton matched with the blood sample of the father of the deceased and all the sampling and testing have been done by experts whose scientific knowledge and experience have not been doubted in these proceedings. We have, therefore, no reason to discard the evidence of PW19, PW20 and PW21. Prosecution has, therefore, succeeded in showing that the skeleton recovered from the house of the accused was that of Diana daughter of Allen Jack Routley and it was none other than the accused, who had strangulated Diana to death and buried the dead body in his house.


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