Each student at the Forensic Sculpture Workshop at the New York Academy of Art (NYAA) begins with a skull. More specifically, each begins with a plaster replica of a real human skull made by a medical examiner, a facsimile of an unidentified crime victim in New York City.
From this foundation, the students sculpt a face, using a block of clay and whatever information they can glean from the ongoing investigations — such as age, height, gender and race. They also included grimmer details, such as the locations of bullet holes or crushed bones.
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h/t Hyperallergic