Page last updated at 15:10 GMT, Thursday, 17 September 2009 16:10 UK

Yale worker charged with murder

Raymond Clark is led into court in New Haven, Connecticut, on 17 September 2009
Raymond Clark worked in the same building as Annie Le

A Yale University laboratory technician has been charged with murdering student Annie Le, US police say.

Raymond Clark was arrested at a motel where he had been staying since being released by police on Wednesday, following DNA testing.

The body of Ms Le was found on Sunday - her planned wedding day - in a wall cavity in a research building. She had been missing for a week.

A post mortem report confirmed 24-year-old Ms Le had been strangled.

New Haven Police Chief James Lewis said "an arrest warrant was signed... charging Clark with the murder of Annie Le".

Mr Lewis said Mr Clark and Ms Le worked in the same building, but would not say whether they knew each other. He called the killing "an issue of workplace violence".

Mr Clark appeared before a judge on Thursday who set bail at $3m (£1.8m). The AP news agency said he had not entered a plea.

Sniffer dog

Ms Le's body was in a deep recess within a basement wall - in an area where cables, pipes and ducts run between floors - of a research building where she worked as a medical researcher.

Police Chief James Lewis: "Annie Le was a young woman with unlimited potential"

Security video showed the pharmacology graduate student arriving but not leaving.

After repeated searches, a sniffer dog discovered her body five days later - on the day she had been due to marry Columbia University graduate student Jonathan Widawsky.

The office of the state chief medical examiner, Dr Wayne Carver, said the death of Ms Le was caused by "traumatic asphyxia due to neck compression".

The suspect, 24-year-old Raymond Clark, was taken into custody on Wednesday after police obtained a warrant to search his house in Middletown, Connecticut.

Police said he voluntarily submitted to DNA testing, the results of which would be compared with more than 150 pieces of evidence taken from the scene.

US media report that he was kept under surveillance after leaving the police station, and spending the night at a Super 8 motel in Cromwell, Connecticut.

Police moved in and arrested Mr Clark at the motel on Thursday morning.

The killing has shocked students at the Ivy League university, who have been leaving flowers and candles near the laboratory where Ms Le worked.

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