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'Sperm clock' could pinpoint time of a rape

By Anna Gosline

2 March 2005

THE predictable death of sperm in condoms laced with spermicide could help police pinpoint the time of a rape, and possibly even corroborate the testimony of the victim or the defendant.

An increasing number of rapists are using condoms, forensic medical examiners report. A 1999 study in Oakland, California, found that 13.5 per cent of assailants used one, probably to protect themselves from identification by DNA profiling. Those condoms are sometimes recovered if they are discarded at the crime scene, or at a suspect’s home, and can be useful in a police investigation.

This led Ginger Lucero and Ismail Sebetan…

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