中美警务比较对我国公安改革的启示

我们通过对中美警察的警察机构、警察快速反应机制、社区警务、技术装备等方面的比较后得出:中国应该从美国的警务发展中汲取有益经验,夯实群众基础工作,建设立体治安防控体系,提高公安科技水平,建立具有中国特色的高效警务机制,做好社会稳定工作。     

影响快速处置交通事故现场的主要原因及其解决办法

道路交通安全与畅通是道路交通管理的核心。我们着重通过研究当前快速处理交通事故现场存在的问题，提出了快速处理交通事故现场保障机制的创新构想。     

Identifying deviant sexual interest in a sex offender sample using dual-target rapid serial visual presentation task

To investigate the dual-target rapid serial visual presentation (dtRSVP) task as a measure of deviant sexual interest (i.e. a sexual interest in children), we administered a dtRSVP with gender- and age-specific pictorial stimuli to child sex offenders (n = 69), other sex offenders (n = 43), non-sex offenders (n = 14), and community controls (n = 88). We hypothesized that (1) stimuli belonging to the preferred gender and age group presented as targets (both T1 and the subsequent T2) in the serial sequence would be more accurately detected than non-preferred stimuli and that (2) this increased detection would reduce the detection of targets later in the serial sequence (T2) due to an attentional blink. Our findings supported hypothesis 1 and partly supported hypothesis 2. Although we found group differences, individual indices based on detection rates did not allow for individual-level diagnostic categorization of participants.     

A new method for the recovery and evidential comparison of footwear impressions using 3D structured light scanning

Footwear impressions are one of the most common forms of evidence to be found at a crime scene, and can potentially offer the investigator a wealth of intelligence. Our aim is to highlight a new and improved technique for the recovery of footwear impressions, using three-dimensional structured light scanning. Results from this preliminary study demonstrate that this new approach is non-destructive, safe to use and is fast, reliable and accurate. Further, since this is a digital method, there is also the option of digital comparison between items of footwear and footwear impressions, and an increased ability to share recovered footwear impressions between forensic staff thus speeding up the investigation.     

试论治安复杂地区社会治安防控体系构建中的几个问题

社会治安复杂地区具有集中性、复杂性、历史性、外源性、动态性的特性。社会治安防控体系建设的目标应围绕"稳、低、少"三个方面。社会治安复杂地区防控体系建设的主体框架应包括:情报体系建设,巡防网络建设,快速反应机制,治安管理机制,打击整治机制,犯罪预防机制。     

Designing a graduate entry route for police recruits: lessons from a rapid evidence assessment of other professions

ABSTRACT

Policing in the UK is currently undergoing changes to the training and attained qualifications of entry level police officers. The College of Policing is in the process of developing three entry routes into the profession, one of which is a graduate conversion course for those new recruits who hold, at a minimum, a Bachelor’s degree. The objective of this research was to gather evidence on existing conversion courses to inform the development of this route. A rapid evidence assessment was undertaken to a narrative synthesis of the literature on graduate conversion courses in other professions. Fifty-one studies were identified and coded. Four main themes emerged from the available evidence as being central. These themes – learning styles, translating theory into practice, teaching methods and assessment were cross cut by pedagogical sub-themes of collaborative learning, and reflective practice. Policy and practice implications for a policing conversion course are drawn out to guide development and delivery of police training and education in the 21^st century.     

Developmental validation studies on the RapidHIT™ Human DNA Identification System

The RapidHIT™ Human DNA Identification System is a fully integrated system (sample in, result out) capable of rapidly generating STR DNA profiles in around 90 min. Here we present a portion of the results from the developmental validation studies performed on the RapidHIT System.     

Rapid amplification of commercial STR typing kits

Forensic DNA typing is currently conducted in approximately 8–10 h. The process includes DNA extraction, quantitation, multiplex PCR amplification, and fragment length detection. Today's commercial multiplex short tandem repeat (STR) typing kits are not optimized for rapid PCR thermal cycling. Current protocols require approximately 3 h for amplifying a multiplex containing 15 STR loci plus amelogenin. With the continuing development of miniaturization technologies such as microfluidic and micro-capillary devices, there is a desire to reduce the overall time required to type DNA samples. Such miniature devices could be used for initial screening at a crime scene, at a border, and at airports. There is also the benefit of reducing the required PCR amplification time for labs typing single-source reference samples. Surveys of fast processing polymerases working in combination with rapid cycling protocols have resulted in the development of a ‘rapid’ PCR amplification protocol. Results are obtained in less than 36 min run on a standard peltier-based thermal cycler employing a heating rate of 4 °C/s. Capillary electrophoresis characterization of the PCR products indicates good peak balance between loci, strong signal intensity and minor adenylation artifacts. Genotyping results are concordant with standard amplification conditions utilizing a standard 3 h (non-rapid) thermal cycling procedure. The rapid assay conditions are robust enough to routinely amplify 0.5 ng of template DNA (with 28 cycles).     

Developmental Validation of the ANDE 6C System for Rapid DNA Analysis of Forensic Casework and DVI Samples

A developmental validation was performed to demonstrate reliability, reproducibility, and robustness of the ANDE Rapid DNA Identification System for processing of crime scene and disaster victim identification (DVI) samples. A total of 1705 samples were evaluated, including blood, oral epithelial samples from drinking containers, samples on FTA and untreated paper, semen, bone, and soft tissues. This study was conducted to address the FBI’s Quality Assurance Standards on developmental validation and to accumulate data from a sufficient number of unique donors and sample types to meet NDIS submission requirements for acceptance of the ANDE Expert System for casework use. To date, no Expert System has been approved for such samples, but the results of this study demonstrated that the automated Expert System performs similarly to conventional laboratory data analysis. Furthermore, Rapid DNA analysis demonstrated accuracy, precision, resolution, concordance, and reproducibility that were comparable to conventional processing along with appropriate species specificity, limit of detection, performance in the presence of inhibitors. No lane-to-lane or run-to-run contamination was observed, and the system correctly identified the presence of mixtures. Taken together, the ANDE instrument, I-Chip consumable, FlexPlex chemistry (a 27-locus STR assay compatible with all widely used global loci, including the CODIS core 20 loci), and automated Expert System successfully processed and interpreted more than 1200 unique samples with over 99.99% concordant CODIS alleles. This extensive developmental validation data provides support for broad use of the system by agencies and accredited forensic laboratories in single-source suspect-evidence comparisons, local database searches, and DVI.     

DNA investigative lead development from blood and saliva samples in less than two hours using the RapidHIT™ Human DNA Identification System

The RapidHIT™ Human DNA Identification System produces full STR DNA profiles (sample in, results out) in 90 min. Here we present results from a new protocol on the RapidHIT System, designed for crime scene samples. Data are presented for blood and saliva samples, with results for a range of samples and substrates. Success rates and sensitivity display a high level of performance for the sample types evaluated in the study and demonstrate the efficacy of the new protocol for crime scene samples.