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Forensic DNA phenotyping (FDP) encompasses a set of technologies aimed at predicting phenotypic characteristics from genotypes. Advocates of FDP present it as the future of forensics, with an ultimate goal of producing complete, individualised facial composites based on DNA. With a focus on individuals and promised advances in technology comes the assumption that modern methods are steadily moving away from racial science. Yet in the quantification of physical differences, FDP builds upon some nineteenth- and twentieth-century scientific practices that measured and categorised human variation in terms of race. In this article I complicate the linear temporal approach to scientific progress by building on the notion of the folded object. Drawing on ethnographic fieldwork conducted in various genetic laboratories, I show how nineteenth- and early twentieth-century anthropological measuring and data-collection practices and statistical averaging techniques are folded into the ordering of measurements of skin color data taken with a spectrophotometer, the analysis of facial shape based on computational landmarks and the collection of iris photographs. Attending to the historicity of FDP facial renderings, I bring into focus how race comes about as a consequence of temporal folds. [ABSTRACT FROM AUTHOR]

Forensic DNA Phenotyping (FDP) encompasses an emerging set of technologies aimed at predicting physical characteristics of unknown suspects from crime scene DNA traces. In its application FDP involves a variety of settings: research laboratories where FDP tests are developed, forensic laboratories where FDP technologies are used to analyze crime scene DNA traces, and finally the criminal investigation, where results of tests are applied towards finding suspects. In this paper I show that the practices in each of these settings work by a different set of concerns, which I articulate by adopting the notion of "logics" as developed by Annemarie Mol. I ethnographically trace FDP from research lab to investigation, identifying three different logics along the way: those of accuracy, commonality, and valuing respectively. Taken together, I show that these practices do not linearly accumulate but form a heterogeneous assemblage, adding nuance to discussions surrounding FDP. [ABSTRACT FROM AUTHOR]