Angi M Christensen
Dados Biográficos
| ID | 597695 |
|---|---|
| NOME | Angi M Christensen |
| PRENOMES | Angi M |
| SOBRENOME | Christensen |
| ASSINATURA | CHRISTENSEN A M |
| AFILIAÇÕES | Federal Bureau of Investigation |
| VERIFICADO | Não |
| TOTAL DE OBRAS | 34 |
| TOTAL DE CITAÇÕES | 7 |
| TOTAL COMO AUTOR | 34 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 2005 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2023 |
| ÍNDICE H | 1 |
CT Imaging of a Case Involving Thermal and Sharp Trauma
This case involved a multiagency investigation of a fire in which an adult female and her three young children were found deceased. Anthropological analysis, including imaging using high-resolution computed tomography (CT) scanning, was used to assess skeletal trauma, which involved thermal alterations as well as sharp trauma. Due to fire-related discoloration of the bone, sharp traumas on the cranium of the adult were difficult to appreciate vis…
Fractography of Bone Using Reconstructed Computed Tomography (CT) Scans
Fractography has been shown to be applicable to forensic assessments of skeletal trauma by observing the presence and orientation of fracture surface features, which reveal information about the direction of crack propagation. Previous studies have examined dry or processed bone surfaces, often fractured under controlled experimental conditions. Here we assess a series of clinical computed tomography scans involving lower extremity injuries and f…
Forensic Fractography of Bone
Fractography involves the study of fractures and cracks in a material in order to understand the cause of failure. Even as a complex, highly hierarchical composite, bone is a material that obeys physical laws, including cracking behavior. The fields of fractography and fracture mechanics, therefore, have much to offer in our understanding of bone's response to loading and force. Here we discuss how fractography can be used in the assessment of fr…
The Use of Bone Fluorescence to Facilitate DNA Sampling
DNA is increasingly used in skeletal remains cases for identification and to resolve commingling. The implementation of a sampling strategy based on the likelihood of obtaining viable DNA profiles could minimize destruction of bones, expedite identification, and save time and resources by reducing the need to resample. Here we test whether bone fluorescence is a good indicator of potential DNA yield. Samples consisted of remains from seven differ…
Dowsing for Bone
Locating clandestine graves is often a significant challenge for law enforcement and other investigators. A number of search techniques can be employed including visual assessments, canines, geophysical techniques, and imaging, often depending on the location/terrain, case information, and available resources. Dowsing is believed by some to be a reliable method for locating underground items of interest including water, oil, ore, and even graves;…
Discovery Context of Skeletal Remains Received at the Federal Bureau of Investigation Laboratory
Cases received for anthropological examination by the Federal Bureau of Investigation (FBI) Laboratory for a 4-year period (2013–2017) were reviewed for the context of the discovery of remains. The assessment was compared with a previous similar review of cases received by the Massachusetts Office of the Chief Medical Examiner (OCME), with particular attention to whether remains were initially discovered through deliberate law enforcement searche…
Fractography of Long Bones with High-Velocity Projectile Trauma
Previous studies of bone fractography have examined only cases of blunt trauma. Here we assess whether fracture surface features are also found on bones subjected to high-velocity projectile trauma. Civil War-era long bones were assessed for the presence of fracture surface features identified in previous studies. Of 60 bones examined, which included all major long bones, fracture surface features were identified on 57 (95%). Arrest ridges and ca…
Bilateral Asymmetry of Nutrient Foramen Position in the Human Femur and Tibia
Sorting commingled human remains can be a challenging and time-consuming task, and methods that can be performed quickly and inexpensively are desirable in forensic investigations. This study examines the degree of bilateral asymmetry in nutrient foramen position in the femur and tibia to determine its usefulness in pair-matching and osteometric sorting. Differences in nutrient foramen position between left-right pairs of the same person (bilater…
A Comparison of Two Gelatin Consolidants for the Preservation of Thermally Altered Skeletal Remains
A recent study (Topoleski & Christensen 2019) found that applying a food-grade gelatin solution to thermally altered skeletal remains resulted in significantly better structural preservation (reduced fragmentation) during recovery and transport compared to untreated controls. Here we expand upon this research and test whether a technical-grade gelatin would result in even better skeletal evidence preservation. Results show that bones treated with…
CT‐based sex estimation on human femora using statistical shape modeling
OBJECTIVES: Estimating the sex of decomposed corpses and skeletal remains of unknown individuals is one of the first steps in the identification process in forensic contexts. Although various studies have considered the femur for sex estimation, the focus has primarily been on a specific single or a handful of measurements rather than the entire shape of the bone. In this article, we use statistical shape modeling (SSM) for sex estimation. We hyp…
A Case of Split-Line Research Specimens Submitted for Forensic Anthropological Analysis
A case is reviewed in which skeletal specimens presenting with uniformly distributed black markings were submitted for forensic anthropological examination. The specimens were recovered in connection with an FBI investigation involving the international black market in human body parts. These specimens, however, were distinctive in presentation, and were determined to have likely been previously used in a research study using the "split-line" tec…
Age Estimation
Individual Skeletal Variation
Personal Identification
Ancestry Estimation
Examination Methods
Medicolegal Significance
Osteology and Odontology
Other Issues in Modern Forensic Anthropology and Final Case Study
Forensic Archaeology and Scene Processing
Sex Estimation
Processing and Preparing Remains
Stature Estimation
Forensic Taphonomy
Analysis of Skeletal Trauma
Assessing the variation in individual frontal sinus outlines
It is often suggested that the frontal sinus morphology of no two individuals is alike, and that the configuration of the frontal sinus is as unique to an individual as his or her fingerprints. However, no empirical, quantitative testing of the uniqueness of frontal sinus outlines has ever been performed. Such testing is necessary for frontal sinus identifications to be admissible in many courts. This study investigated frontal sinus outline vari…
Discovery Context of Skeletal Remains Received at the Federal Bureau of Investigation Laboratory
Cases received for anthropological examination by the Federal Bureau of Investigation (FBI) Laboratory for a 4-year period (2013–2017) were reviewed for the context of the discovery of remains. The assessment was compared with a previous similar review of cases received by the Massachusetts Office of the Chief Medical Examiner (OCME), with particular attention to whether remains were initially discovered through deliberate law enforcement searche…
CT‐based sex estimation on human femora using statistical shape modeling
OBJECTIVES: Estimating the sex of decomposed corpses and skeletal remains of unknown individuals is one of the first steps in the identification process in forensic contexts. Although various studies have considered the femur for sex estimation, the focus has primarily been on a specific single or a handful of measurements rather than the entire shape of the bone. In this article, we use statistical shape modeling (SSM) for sex estimation. We hyp…
Forensic Anthropology
Welcome to Forensic Anthropology, the only journal devoted to the advancement of the science and professional development of the fields of forensic anthropology and forensic archaeology. Forensic Anthropology is an inclusive venue created to foster professional discussions about research, policy, and the application of forensic anthropology globally. Issues will (at least initially) be published quarterly and available in electronic and print for…
Assessing the variation in individual frontal sinus outlines
It is often suggested that the frontal sinus morphology of no two individuals is alike, and that the configuration of the frontal sinus is as unique to an individual as his or her fingerprints. However, no empirical, quantitative testing of the uniqueness of frontal sinus outlines has ever been performed. Such testing is necessary for frontal sinus identifications to be admissible in many courts. This study investigated frontal sinus outline vari…
Age Estimation
Individual Skeletal Variation
Personal Identification
Ancestry Estimation
Examination Methods
Medicolegal Significance
Osteology and Odontology
Other Issues in Modern Forensic Anthropology and Final Case Study
Forensic Archaeology and Scene Processing
Sex Estimation
Processing and Preparing Remains
Stature Estimation
Forensic Taphonomy
Analysis of Skeletal Trauma
Laboratory Manual for Forensic Anthropology
Introduction to Forensic Anthropology
Forensic Anthropology
Welcome to Forensic Anthropology, the only journal devoted to the advancement of the science and professional development of the fields of forensic anthropology and forensic archaeology. Forensic Anthropology is an inclusive venue created to foster professional discussions about research, policy, and the application of forensic anthropology globally. Issues will (at least initially) be published quarterly and available in electronic and print for…
Using an Alternate Light Source (ALS) to Search for Surface Deposited Skeletal Remains
Searches for skeletal remains can be complicated by taphonomic processes that result in the disarticulation, fragmentation, and redistribution of remains. The consequence is often an incomplete recovery, with small bones, fragments, and teeth especially susceptible to being overlooked during a search. Here we test whether supplementing a traditional line search with a second search using an alternate light source (ALS), performed after dark, will…
Frontal Sinus Absence Rates in Various Populations
Antemortem and postmortem radiologic comparisons can be used to help confirm or refute a forensic human identification. When comparing antemortem and postmortem records, knowledge of the population frequencies of shared traits (or how often a trait occurs in the relevant population) can provide a statistical basis for supporting the identification (or exclusion). While trait configurations such as frontal sinus shape are often used, even the pres…
Application of Bone Fractography to a Medical Examiner Sample
This case study review assesses the applicability of forensic fractography of bone to forensic casework through the evaluation of four blunt-trauma cases. The objectives were to determine (1) whether fractographic features are readily identifiable in real-world trauma scenarios and (2) whether the fractographic analysis corresponds to traditional anthropological fracture pattern analysis. Fractography is the study of fracture surface features and…
Forensic Fractography of Bone
Fractography is the study of fracture surface morphology, and it can be used to assess a material's mechanical properties as well as to determine the underlying mechanisms leading to material failure. Fracture surfaces reveal information about fracture initiation and propagation in bone, yet little consideration has been given to bone fracture surfaces in forensic contexts. Moreover, the science of fractography has never been applied to bone in f…
The Use of X-ray Computed Tomography Technologies in Forensic Anthropology
The use of radiology, including X-ray computed tomography (CT), to examine skeletal remains is not new, but the use of postmortem CT (PMCT) in medicolegal investigations by forensic anthropologists is relatively rare, at least in the United States. The use of medical or industrial CT technology may be a viable option available to forensic anthropologists for digital preservation and to conduct nondestructive analyses of the internal and external …
CT‐based sex estimation on human femora using statistical shape modeling
OBJECTIVES: Estimating the sex of decomposed corpses and skeletal remains of unknown individuals is one of the first steps in the identification process in forensic contexts. Although various studies have considered the femur for sex estimation, the focus has primarily been on a specific single or a handful of measurements rather than the entire shape of the bone. In this article, we use statistical shape modeling (SSM) for sex estimation. We hyp…
A Case of Split-Line Research Specimens Submitted for Forensic Anthropological Analysis
A case is reviewed in which skeletal specimens presenting with uniformly distributed black markings were submitted for forensic anthropological examination. The specimens were recovered in connection with an FBI investigation involving the international black market in human body parts. These specimens, however, were distinctive in presentation, and were determined to have likely been previously used in a research study using the "split-line" tec…
Forensic Anthropology and Bioarchaeology Studies (29 obras) · Medicine (18 obras) · Computer Science (17 obras) · Engineering (13 obras) · Forensic and Genetic Research (12 obras) · Autopsy Techniques and Outcomes (11 obras) · Biology (11 obras) · Archaeology (10 obras) · Forensic anthropology (9 obras) · Anatomy (7 obras)