NEW HAVEN, Conn. — A Yale lab technician was arrested this morning at a hotel and charged with murdering a graduate student whose body was found stuffed in the wall of a research building on what would have been her wedding day.

Police said it was a case of workplace violence, but didn't elaborate.

Police had been waiting outside the Super 8 hotel in Cromwell, about 25 miles north of the Ivy League campus, where Raymond Clark III got a room shortly after being released from police questioning in the death of 24-year-old Annie Le.

Clark was expected to be arraigned this afternoon or Friday morning on a murder charge, New Haven Police Chief James Lewis said.

"It is important to note that this is not about urban crime, university crime, domestic crime but an issue of workplace violence, which is becoming a growing concern around the country," Lewis said.

Le was found dead on Sunday, her body hidden in the basement wall of a building where she worked as a medical researcher, on the day she was to marry her college sweetheart. The Connecticut medical examiner said Wednesday that Le died of "traumatic asphyxiation."

Clark was under constant surveillance after he was released, and police spent Wednesday night and this morning staking out the Super 8 hotel where Clark was staying.