Detection and use of salivary hemagglutinins for forensic blood grouping

A sensitive method for the detection of anti-A and anti-B hemagglutinins in fresh saliva has been developed. The method utilizes a bromelin treated erythrocyte suspension as indicator cells and includes a simple procedure to concentrate these hemagglutinins. Antiserum directed against immunoglobulin A enhances the hemagglutination assay. We find that these salivary hemagglutinins are present in over 90% of the population and that their titer remains stable over a period of two months. These hemagglutinins can be used to blood type the donor of a saliva sample and can be used in a confirmatory test that complements the commonly used absorption-inhibition test which is used to detect salivary blood group agglutinogens. In preliminary studies we have determined that hemagglutinins can be successfully isolated and analyzed from dried saliva stains.     

Prosecutorial discretion to defer criminalization: The effects of defendant's ascribed and achieved status characteristics

This research contributes to a further understanding of prosecutorial discretion by exploring tenets of casual attribution theory and etiology of bias theory as each informs an uncertainty avoidance perspective on the prosecutor's decision to divert felony drug defendants from criminal prosecution and into a treatment program. The sociolegal consequences of the exercise of this early screening decision are expressed by both conflict theorists and labeling theorists. Our analysis involves estimating main effects and interaction effects of defendant ascribed status and achieved status on the likelihood of diversion. The findings indicate partial support for hypotheses derived, from the theoretical perspectives pursued. In addition these findings point to a more complex model of the subjective nature of the exercise of prosecutorial discretion, a model that benefits from understanding the salience of minimizing uncertainty in the decision to criminals.     

PATTERNS OF FORGETTING AND TELESCOPING: An Analysis of LEAA Survey Victimization Data

The research reported in this article sought to estimate the feasibility of measuring patterns of forgetting and forward telescoping in victimization survey data. It was suggested that if these two sources of memory bias could be accurately and reliably measured, victimization survey data could be adjusted to produce improved estimates of both the amount of crime and of changes in the crime rate over time. Examination of the data suggests that the likelihood of developing a general model for correcting mnemonic biases is very low. ll?is conclusion follows from: (I) evidence indicating differential victimization survey recall across reported and unreported crime events; (2) the apparent dissimilarities of telescoping/forgetting patterns across samples and seasons; and (3) the lack of a stable comparison estimate of the “true” distribution of incidents with which to calibrate a correction model.     

POVERTY, URBANIZATION, AND CRIME

In an effort to evaluate the situational determinants of crime, principal components analysis was used to reduce 59 demographic and socioeconomic characteristics of 840 American cities to six independent factors: affluence, stage in life cycle, economic specialization, expenditures policy, poverty, and urbanization. When regressed upon crime rates two of these six factors, urbanization and poverty, were found to be the more important criminogenic forces. The exception to this generalization was the South, where stage in life cycle was more important than poverty in explaining crime. One reason for this exception may be that the South, though having a lower standard of living than other regions of the country, does not have the “culture of poverty” usually associated with lower income. Contrary to the assumption upon which most ecology of crime studies are based, larger cities (over 100,000 in population) are not representative of all cities. Greater association between socioeconomic variables and crime was found in larger than in smaller cities.     

A comparison of the use of visible microspectrometry and high performance thin layer chromatography for the discrimination of aqueous inks used in porous tip and roller ball pens

Ink lines made by porous tip and roller ball pens have been examined by high performance thin layer chromatography (HPTLC) and by transmission microspectrophotometry (VM) in the visible region. Better discrimination between apparently similar coloured inks was obtained with HPTLC but VM has value as an additional technique for ink examination.