PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Forensic scientist at a scene of crime. The scientist here is using a laser to look for possible traces of semen at the scene of a murder. The area is sprayed with a marker which binds to proteins in the semen. If bound, the marker fluoresces under the light from the laser. This was photographed at the scene of the murder of a 49 year old woman who had been stabbed repeatedly. Traces of semen may be used to provide a DNA fingerprint, possibly linking a suspect to the scene. Photographed in Flushing, New York. Detective Roussine, NYPD.).
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