Rapid and nondestructive analysis of lipstick on different substrates using ATR-FTIR spectroscopy and chemometrics

Lipstick can be an important piece of evidence in crimes like murders, rapes, and suicides. Due to its prevalence, it can be an important corroborative evidence in crime reconstruction. The analysis of such evidence can provide an evidentiary link between the suspect, the victim, object, or the crime scene. We report the use of nondestructive ATR-FTIR spectroscopy combined with chemometrics for the classification of 10 brands of lipsticks with nine samples each. Chemometric method of partial least square-discriminant analysis (PLS-DA) has been employed to interpret the data and classify the samples into their respective classes. The PLS-DA model provides an AUC figure above 0.99 in all brands except one; for which it is slightly less at 0.94. We have also tested the traces of these lipstick samples on different substrates treating them as unknowns in the already trained PLS-DA model. 100% of the samples on nine substrates viz. a cotton, nylon, plastic, dry tissue, denim (blue jeans), wet tissue, nitrile gloves, white paper, and polyester were correctly attributed to their source brand. In conclusion, the results suggest that ATR-FTIR combined with the chemometrics is a rapid, nondestructive, and accurate method for the discrimination and source attribution of lipstick. This study has potential for use in actual forensic casework conditions.     

Understanding Domestic Violence in India During COVID-19: a Routine Activity Approach

Domestic violence, a prevalent problem in India, saw an increase during the lockdown imposed to contain the spread of COVID-19. This article explores the factors associated with an increase in domestic violence incidents during COVID-19 by applying routine activity theory (RAT) framework. Data were drawn from the incidents of domestic violence reported in newspapers. Data was analyzed using content analysis and three major themes, i.e., three principle components of RAT—motivated offender, suitable target, and absence of capable guardian—were drawn. Findings reveal that sources of motivation in domestic violence perpetrators during the lockdown were alcohol and unemployment. The symbolic value that perpetrators associated with women, lower inertia, visibility, and accessibility to the perpetrators made women suitable targets of domestic violence. Lastly, shortage of police force and travel restrictions on formal and informal sources resulted in the absence of capable guardians. We conclude that changes in the routine activities of people during the COVID-19 lockdown provided more opportunities to the perpetrators of domestic violence.

     

Temperature‐Dependent Postmortem Changes in Human Cardiac Troponin‐T (cTnT): An Approach in Estimation of Time Since Death

Estimation of time of death is an indispensible requirement of every medico‐legal autopsy, but unfortunately, there is not a single method by which it could be determined accurately. This study focused on the temperature‐dependent postmortem degradation of cardiac troponin‐T and its association with postmortem interval (PMI) in human. The analysis involved extraction of the protein, separation by denaturing gel electrophoresis (SDS‐PAGE), and visualization by Western blot using cTnT‐specific monoclonal antibodies. The area of the bands within a lane was quantified by scanning and digitizing the image using Gel Doc (Universal Hood). The results indicate a characteristic banding pattern among human cadavers (n = 6) and a pseudo‐linear relationship between percentage of cTnT degradation and the log of the time since death (r > 0.95), which can be used to estimate the postmortem interval. The data presented demonstrate that this technique can provide an extended time range during which PMI can be more accurately estimated.     

What’s Law Got to Do With It? Economics,Nation-Building,and Human Rights in India and Beyond

The review essay examines three recently published books: Eleanor Newbigin’s The Hindu Family and the Emergence of Modern India: Law, Citizenship and Community, Narendra Subramanian’s Nation and Family: Personal Law, Cultural Pluralism, and Gendered Citizenship in India, and Yüksel Sezgin’s Human Rights Under State-Enforced Religious Family Laws in Israel, Egypt and India.     

Regional wages and economic development: A case study of manufacturing wages in India, 1950–1960

This paper examines some hypotheses with respect to the interregional wage variations in Indian manufacturing from 1950 to 1960. The choice of this period was determined by the availability of relevant data. It was found in an earlier study that the regional wage structure tended to be flexible during the period under consideration. In this paper, an attempt has been made to explain the inter‐regional wage differentials by analysing the data on trade unionism, per capita income, productivity, capital intensity, non‐primary employment and consumer prices. It is argued that the level of regional wage differentials can be explained by relative differentials in productivity and in trade unionism, but the change in wage differentials depends upon the changing capital intensity in respective regions.     

Hair-MAP: a prototype automated system for forensic hair comparison and analysis

This paper demonstrates the feasibility of the automation of forensic hair analysis and comparison task using neural network explanation systems (NNESs). Our system takes as input microscopic images of two hairs and produces a classification decision as to whether or not the hairs came from the same person. Hair images were captured using a NEXTDimension video board in a NEXTDimension color turbo computer, connected to a video camera. Image processing was done on an SGI indigo workstation. Each image is segmented into a number of pieces appropriate for classification of different features. A variety of image processing techniques are used to enhance this information. Use of wavelet analysis and the Haralick texture algorithm to pre-process data has allowed us to compress large amounts of data into smaller, yet representative data. Neural networks are then used for feature classification. Finally, statistical tests determine the degree of match between the resulting collection of hair feature vectors. An important issue in automation of any task in criminal investigations is the reliability and understandability of the resulting system. To address this concern, we have developed methods to facilitate explanation of neural network's behavior using a decision tree. The system was able to achieve a performance of 83% hair match accuracy, using 5 of the 21 morphological characteristics used by experts. This shows promise for the usefulness of a fuller scale system. While an automated system would not replace the expert, it would make the task easier by providing a means for pre-processing the large amount of data with which the expert must contend.     

Deposition of 7-aminoflunitrazepam and flunitrazepam in hair after a single dose of Rohypnol

In recent years, there has been a notable increase in the number of reports on drug-facilitated sexual assault. Benzodiazepines are the most common so-called "date-rape" drugs, with flunitrazepam (Rohypnol) being one of the most frequently mentioned. The aim of this study was to determine whether flunitrazepam and its major metabolite 7-aminoflunitrazepam could be detected in hair collected from ten healthy volunteers after receiving a single 2 mg dose of Rohypnol using solid phase extraction and NCI-GC-MS. Such data would be of great importance to law enforcement agencies trying to determine the best time interval for hair collection from a victim of drug-facilitated sexual assault in order to reveal drug use. Ten healthy volunteers (eight women and two men, 21 to 49 years old) participated in the study. The following hair samples were collected from each volunteer: one before flunitrazepam administration, and 1, 3, 5, 14, 21, and 28 days after. In five volunteers, 7-aminoflunitrazepam was detected 24 h after flunitrazepam administration and remained in hair throughout the entire 28-day study period (0.6-8.0 pg/mg). In two cases, 7-aminoflunitrazepam appeared in hair 21 days after drug intake (0.5-2.7 pg/mg), and in two subjects 14 days later (0.5-5.4 pg/mg). In one volunteer, 7-aminoflunitrazepam was detected on day 14 and 21 but concentrations were below the quantitation limit. Flunitrazepam was detected in some samples but all concentrations were below the quantitation limit (0.5-2.3 pg/mg).     

Exploring the trend of violence against women in India

ABSTRACT

India is witnessing growing violence against women including horrific rapes even in major metropolitan areas that have attracted considerable media attention. Insecurity and physical threat to women is real and a major concern. Justice Verma Commission that examined the Delhi rape case has recommended several measures including changes in laws involving crimes against women, yet little has changed. In this paper we conduct a variety of qualitative and quantitative analyses using open source data to understand the nature and extent of crimes against women in India. Police records indeed suggest a growing escalation in serious crimes against women. The paper also critically examines the efforts of the police and others, particularly non-governmental groups to combat such crimes. A number of policy recommendations are made for prevention including comparative efforts in Korea where crimes against women are similarly serious.