Evaluation of porcine decomposition and total body score (TBS) in a central European temperate forest

The total body score (TBS) is a visual scoring method to scale the succession of decomposition stages. It compares decomposition between cadavers, to connect it with external taphonomic factors and estimate the post-mortem interval. To study decomposition in various climatic environments, pigs are often used as human proxies. Currently, there is one TBS system by Keough et al. (J Forensic Sci. 2017;62:986) for surface-deposited domestic pigs, coming from South Africa. Our study aims to evaluate this method and analyze porcine decomposition in Central Europe to inform forensic research and casework. We conducted an experiment studying six 50 kg pig carcasses in a temperate Swiss forest. Three observers documented decomposition patterns and rated the decomposition stages from photographs based on the porcine TBS model by Keough et al. (J Forensic Sci. 2017;62:986). We documented discrepancies between the carcass decomposition of our specimens and those in the South African study, especially related to the high insect activity in our experiment. Furthermore, we noted factors complicating TBS scoring, including rainfall and scavengers. The agreement between TBS observers from photographs was in the highest agreement category apart from one “substantial agreement” category. Our study is the first in Europe to systematically test the Keough et al. (J Forensic Sci. 2017;62:986) method. The results evidence that regional adaptations are required to be applicable for other environments. We present a modified approach based on experimental observations in a Swiss temperate forest. The identification of regional decomposition patterns and drivers will inform future taphonomy research as well as forensic casework in comparable contexts in Central Europe

The genetic history of Scandinavia from the Roman Iron Age to the present

The authors acknowledge support from the National Genomics Infrastructure in Stockholm funded by Science for Life Laboratory, the Knut and Alice Wallenberg Foundation and the Swedish Research Council, and SNIC/Uppsala Multidisciplinary Center for Advanced Computational Science for assistance with massively parallel sequencing and access to the UPPMAX computational infrastructure. We used resources from projects SNIC 2022/23-132, SNIC 2022/22-117, SNIC 2022/23-163, SNIC 2022/22-299, and SNIC 2021-2-17. This research was supported by the Swedish Research Council project ID 2019-00849_VR and ATLAS (Riksbankens Jubileumsfond). Part of the modern dataset was supported by a research grant from Science Foundation Ireland (SFI), grant number 16/RC/3948, and co-funded under the European Regional Development Fund and by FutureNeuro industry partners.Peer reviewedPublisher PD

Social implications of unburied corpses from intergroup conflicts : postmortem agency following the Sandby borg massacre

A massacre took place inside the Sandby borg ringfort, southeast Sweden, at the end of the fifth century. The victims were not buried, but left where they died. In order to understand why the corpses were left unburied, and how they were perceived following the violent event, a theoretical framework is developed and integrated with the results of osteological analysis. I discuss the contemporary normative treatment of the dead, social response to death and postmortem agency with emphasis on intergroup conflict and ‘bad death’. The treatment of the dead in Sandby borg deviates from known contemporary practices. I am proposing that leaving the bodies unburied might be viewed as an aggressive social action. The corpses exerted postmortem agency to the benefit of the perpetrators, at the expense of the victims and their sympathizers. The gain for the perpetrators was likely political power through redrawing the victim's biographies, spatial memory and the social and territorial landscape. The denial of a proper death likely led to shame, hindering of regeneration and an eternal state of limbo

Dödens kroppslighet : osteoarkeologiska, tafonomiska och forensisk-antropologiska studier av mänskliga kvarlevor

The aim of this work is to advance the knowledge of peri- and postmortem corporeal circumstances in relation to human remains contexts, as well as to demonstrate the value of that knowledge in forensic and archaeological practice and research. This article-based dissertation encompasses papers in bioarchaeology and forensic anthropology, with an emphasis on taphonomy. The studies include analyses of human osseous material and human decomposition in relation to spatial and social contexts, from both theoretical and methodological perspectives. Taphonomic knowledge is vital to interpretations of the circumstances of peri- and postmortem deposition, with a concern for whether features were created by human hand or the result of decomposition processes and other factors. For example, taphonomic knowledge can aid interpretations of the peri- and postmortem sequence of events, of the agents that have affected human remains, as well as for estimations of time since death. When integrated with social theories, taphonomic information can be used to interpret past events.  In this dissertation, a combination of bioarchaeological and forensic taphonomic methods are used to address the question of what processes have shaped mortuary contexts. Specifically, these questions are raised in relation to the peri- and postmortem circumstances of the dead in the Iron Age ringfort of Sandby borg, and about the rate and progress of human decomposition in a Swedish outdoor environment and in a coffin. Additionally, the question is raised of how taphonomic knowledge can inform interpretations of mortuary contexts, and of the current state and potential developments of forensic anthropology and archaeology in Sweden.  The result provides us with information of depositional history in terms of events that created and modified deposits of human remains. Furthermore, this research highlights some limitations in taphonomic reconstructions. The research presented here is helpful for interpretations of what has occurred in the distant as well as recent pasts, to understand potentially confounding factors, and how forensic anthropology can benefit Swedish crime scene investigations. In so doing, the knowledge of peri- and postmortem corporeal circumstances and how it can be used has been advanced in relation to both the archaeological and forensic fields

Forensic archaeology and forensic anthropology within Swedish law enforcement : current state and suggestions for future developments

Archaeological theories and methods are developed to reconstruct past human behavior from fragmentary material remains. The interrelated discipline of physical anthropology addresses questions related to skeletal remains while acknowledging taphonomic parameters. The benefit of integrating these disciplines in forensic investigations has gained increasing acknowledgement over the last decades, but the use of forensic archaeology and anthropology (FAA) remains limited in Sweden. The aim of this study is to analyze the field of FAA in Sweden in relation to outdoor and fire crime scenes where human remains are encountered. Based on qualitative interviews, the state and potential developments of FAA within the Swedish police and the National Board of Forensic Medicine are discussed. The results show that for ensic investigations and analysis of human fragmentary remains are not standardized in Sweden. A great responsibility is placed on the individual crime scene investigator who elects how to investigate these sites and who to contract for the analysis of osteological remains. This can endanger evidence collection and interpretation. This study shows that investigations of buried or fragmentary human remains in Sweden could be aided by a development of FAA. Key steps to further development of FAA within Swedish police involve 1) quantifying cases that could benefit from FAA, 2) establish FAA as an independent subject, 3) develop a national infrastructure, 4) offer professional education in the subject(s), and 4) develop best practice to advance evidence collection and legal security in investigations involving fragmentary human remains. An ongoing ISO accreditation of outdoor crime scene investigations within the Swedish police will hopefully benefit FAA development and collaborations with external partners

Att falla i god jord - En bioarkeologisk analys av massgrav II från Sankt Mikaels kyrkogård i Lund

The Swedish archaeological and bioarchaeological research on executions and execution victims in the past is very sparse. This is partly due to the fact that people who were executed by law were by norm buried outside of the communities and cemeteries. The aim with this study is to contribute knowledge to the field. This is done by bioarchaeologically examine a mass grave containing six individuals who were decapitated. The excavation took place in 1927 at St Michael’s cemetery, Lund, the material is dated to the 16th century. The six individuals had been decapitated and buried together, all headless. Six skulls were found in a pit about 50 centimeters from the grave. By using bioarchaeological methods for examining sex, age, health status, osteometrics, paleopathology and trauma, the author discuss the methods of execution and burial, the diagnosing of one of the individuals possible syphilitic lesions and the six men’s socioeconomic background. The results show that the individuals were men of middle age and of good health. One of the men did have syphilis. The individuals were decapitated by axe and thereafter their remnants were nailed to a pole or such for public display. The author states that the individuals more likely were rather wealthy political opponents than mercenaries which has former been proposed by other sources. It is though likely that they were killed in connection with, or shortly after, one of two battles that occurred in and around Lund during the first half of the 16th century, the Sören Norby-fejden and Grevefejden

Bad Death at Sandby borg : A Bioarchaeological Analysis of Intergroup Violence and Postmortem Agency of Unburied Corpses

The subject of corpses from mass violence is surprisingly unexplored, even though the materiality of the corpse carries strong symbolic capital in conflicts. The aim of my PhD research is to create new knowledge about the implications of unburied corpses that stem from intergroup conflicts, and subsequently to add knowledge concerning how intergroup violence is organised to achieve desired social agendas. In the licentiate thesis presented here, I research the conditions for postmortem agency and how treatment of corpses can be studied in prehistory, specifically through the material remains of unburied corpses from the Sandby borg massacre. The Sandby borg case study is explored through a bioarchaeological perspective. Inside the Iron Age ringfort, the remains of at least 26 individuals have been recovered hitherto. Several of the dead display traces of lethal intergroup violence. By integrating osteology, archaeology, taphonomy and social theories, I show how bioarchaeological research can contribute to the understanding of past postmortem agency in relation to intergroup violence as a social process. The thesis is comprised of four articles

A Taphonomic Interpretation of the Postmortem Fate of the Victims Following the Massacre at Sandby Borg, Sweden

In the ringfort Sandby borg (A.D. 400–550) on Öland, Sweden, remains of 26 unburied humans were excavated between 2010 and 2016. Several of the skeletons display traces of lethal interpersonal violence. This study presents taphonomic analyses of unburied bodies, a situation seldom encountered archaeologically. The depositional context allows us to investigate human taphonomy in interaction with natural agents both “indoors” and “outdoors.” A set of various techniques, including documentation of preservation via zoning, weathering stages, fracture analysis, and archaeothanatology, were applied to understand the perimortem and postmortem fate of the human remains. The results of the taphonomic analysis showed no indications of manipulation postmortem. Expected differences in preservation between in-and outdoor skeletons were not observed. Perimortem fire alterations were interpreted as the result of burning hearths and smoldering roofs. The analysis indicates that the bodies have decomposed in voids. New observations for “unconfined void” taphonomy are presented. The abduction of limbs could be the result of bloating and, hence, indicate a primary deposit of bodies. Atypical lack of splaying of bones might be caused by decomposition in unconfined voids, possibly allowing quicker drainage of putrefaction liquids than in confined voids such as coffins. These observations suggest that processes behind decomposition in voids are not completely understood archaeologically, and might challenge interpretations of mortuary treatment from human remains.In der Wallburg Sandby borg (400-550 n. Chr.) auf Öland, Schweden, wurden die Überreste von 26 nicht bestatteten Menschen gefunden, die zu einem großen Teil Spuren von tödlicher Gewalteinwirkung aufwiesen. In dieser Studie werden die Ergebnisse taphonomischer Untersuchungen von nicht bestatteten menschlichen Überresten präsentiert, auf die man im archäologischen Kontext nur selten trifft. Diese Art der Niederlegung und Auffindung erlaubt es uns die Taphonomie von menschlichen Überresten unter natürlichen Einflüssen von sowohl ”drinnen—im Haus” als auch ”draußen—außer Haus” zu untersuchen. Mehrere unterschiedliche Methoden wurden angewendet um sowohl das perimortale als auch das postmortale Schicksal der menschlichen Überreste zu verstehen, darunter Dokumentation der bewahrten Knochenteile, Stadien der Verwitterung, Bruchanalysen und Archäothanatologie. Die Ergebnisse der taphonomischen Untersuchungen zeigten keine postmortalen Veränderungen. Die erwarteten Unterschiede im Zustand der drinnen und draußen bewahrten Skeletten ließen sich nicht bestätigen. Perimortale Veränderungen der verbrannten Knochen wurden als Resultat von aktiven Feuerherden und brennenden Dächern gedeutet. Die Analyse spricht dafür, dass die Körper in Hohlräumen verwesten. Neue Beobachtungen von Taphonomie in ”unbegrenzten Hohlräumen” werden ebenfalls präsentiert. Die Abduktion von Körpergliedern kann auf Aufblähungen beruhen, und spricht damit für eine primäre Niederlegung von Körpern. Der atypische Mangel an verteilten Knochenmaterial kann durch die Verwesung in unbegrenzten Hohlräumen verursacht worden sein, und damit einen schnelleren Abfluss von Verwesungsflüssigkeit erlauben, als es in begrenzten Hohlräumen wie z. B. Särgen der Fall ist. Diese Ergebnisse sprechen dafür, dass Verwesungsprozesse in Hohlräumen archäologisch noch nicht vollständig zu verstehen sind, und daher die Deutung wie menschliche Überreste behandelt wurden in Frage stellen können.Please contact the authors for full text.</p

I betraktarens öga - Lekmannens förhållande till arkeologi i en komparativ studie mellan Sverige och Peru

The aim of this study is to highlight and attempt to understand the role of archaeology and cultural heritage in different domains. Lima and Stockholm represent the urban population in Peru och Sweden. It is an attempt to discuss the general public’s relation to, and view of, national archaeology through a comparative study. It also discusses what the differences and similarities may be caused by. I use a qualitative interview method and a quantitative survey to gather data. These are later discussed in relation to socioeconomic parameters which were chosen in regard to Bourdieu’s theoretical culture sociology. The parameters constitute of economy, education, cultural heritage legislation, colonization and archeological scientific history. The results show that there are several differences but also similarities between the urban populations of Sweden and Peru. Swedes are less aware of what Swedish archaeology is all about than Peruvians of Peruvian archaeology. This is partly due to the issues Peru is faced with concerning cultural heritage management. The Swedish urban population has an economic advantage, being able to learn more about archaeology. However, the younger Peruvian population has better conditions than the older one – the Peruvian economy has grown considerably in the last decade. Swedes think that archaeology is more interesting abroad while Peruvians are more interested in domestic archaeology due to a strong traditionalism – likely an essect of its history of colonization. Both Peruvians and Swedes are moderately interested in archeology and cultural heritage, but they think that it is very important none the less. They also agree in that archeology is equally important for everyone, regardless of nationality

Outdoor human decomposition in Sweden : A retrospective quantitative study of forensic-taphonomic changes and postmortem interval in terrestrial and aquatic settings

This paper presents a quantitative retrospective study of gross human decomposition in central and southeastern Sweden. The applicability of methods developed abroad for postmortem interval (PMI) estimation from decomposition morphology and temperature are is evaluated. Ninety‐four cases were analyzed (43 terrestrial and 51 aquatic) with a median PMI of 48 days. The results revealed differences in decomposition patterns between aquatic, surface, hanging, and buried remains. While partial saponification and desiccation occurred in cases of surface remains, complete skeletonization was observed in all cases with a PMI over two years. Aquatic skeletonization was slower due to extensive saponification in cases with PMI higher than one year. Formulae for assessing accumulated degree‐days (ADD) from the original methods did not fit the study material. However, a regression analysis demonstrated that 80% of decomposition variance in surface remains could be explained by ADD, suggesting that a geographically adapted equation holds promise for assessing PMI. In contrast, the model fit was poor for aquatic cases (43%). While this may be explained by problems in obtaining reliant aquatic temperature data or an insufficient scoring system, aquatic decomposition may be highly dependent on factors other than ADD alone. This study evaluates the applicability of current PMI methods on an outdoor sample from a previously unpublished region, and represents the first scientific publication of human outdoor decomposition patterns in Sweden. Suggestions for future research are provided, including that scoring methods should incorporate saponification to fit forensic taphonomy in Swedish environments