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Gardai vehicle—Irish Police patrolling Dublin streets. (Credit: Shutterstock)

A suspect in the sexual assault of a 15-year-old girl was identified after his DNA was taken when he was arrested for a traffic offence.

The breakthrough in the case was revealed in a report by Forensic Science Ireland (FSI), which detailed several examples of how the DNA database introduced 18 months ago is helping solve crimes.

The girl went missing in November 2014 while socialising with friends. She underwent a medical examination after she was found and traces of semen were discovered.

The DNA profile from the semen was unknown at the time. But it was entered into the DNA database when it became operational in November 2015, and three months later investigators got a match after a swab was taken from a man who had been detained for a traffic offence.

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