NEW HAVEN , Connecticut ( CNN ) -- A Yale University lab technician was arrested Thursday and charged with murder in the slaying of a graduate student whose body was found in the basement wall of an off-campus medical research building , police said . Raymond Clark , 24 , was arrested and charged with murder , police said . His bond was set at $ 3 million . Raymond Clark was apprehended about 8:10 a.m . ET at a Super 8 motel in Cromwell , Connecticut , where he had spent the night after being released Wednesday following his submission to DNA testing . Bond for Clark has been set at $ 3 million , New Haven Police Chief James Lewis said . Hours after his arrest , Clark appeared in court and did not enter a plea . Standing with chains on his ankles and his palms on a table , he looked only at the judge and spoke only to acknowledge that his rights were read to him . A court date of October 6 was set . Lewis described the killing as an instance of `` workplace violence '' but did not elaborate . Watch chief , acquaintances talk about Clark » . Annie Le 's body was found in the basement wall of an off-campus medical research building Sunday . She had been strangled . Le , 24 , a pharmacology student , was last seen alive September 8 , the day she appeared in a surveillance video entering a four-story lab at 10 Amistad St. , about 10 blocks from the main campus . Her body was found on what was to have been her wedding day . Lewis said the arrest `` went smoothly . '' Watch the police chief announce the arrest » . He could not release details about the charges or whether DNA results led police to arrest Clark , who initially was described as a person of interest in the case . `` This arrest warrant has been sealed , so no further information can be released in order to comply with this court order , '' Lewis said . Clark could have been arrested Wednesday if he had declined to provide DNA samples and allow police to search his home , but he was released after complying , New Haven city spokeswoman Jessica Mayorga said . Police had been monitoring the motel where Clark was staying . When asked about the arrest , Clark 's attorney David Dworski referred CNN to the statement he released earlier : `` We are committed to proceeding appropriately with the authorities with whom we are in regular contact . '' Two other search warrants also were executed Wednesday -- one on property belonging to Clark that was not named in the first warrant and a second for Clark 's vehicle , which was being processed Wednesday evening , Lewis said earlier . He said Clark is a technician who does `` custodial-type '' work at the building . Clark answered police questions for a while but later retained an attorney and stopped , Lewis said . Yale President Richard Levin said while the school 's administration is `` relieved '' by the news of Clark 's arrest , `` we must resist the temptation to rush to judgment . '' Clark , a lab technician at Yale since December 2004 , had nothing in his employment history that `` gave an indication that his involvement in such a crime might be possible , '' Levin said in a statement Thursday . Lewis said Clark and Le worked in the same building and passed in the hallway , but he refused to comment further on whether they knew each other . Investigators have collected about 250 pieces of evidence , Lewis said . Watch police discuss the investigation » . Lewis earlier said police had reviewed about 700 hours of video and interviewed more than 150 people , some more than once . Watch a timeline leading up to Le 's death » . Authorities have not released information on what DNA evidence may have been found , although investigators said earlier that bloody clothing was found hidden above tiles in a drop ceiling in another part of the building . Police have not described the clothes that were found , nor said to whom they might have belonged . Teams of investigators at a Connecticut State Police lab worked through the weekend processing and examining the bloodstained garments . But Thomas Kaplan , editor in chief of the Yale Daily News , said a Yale police official told the college paper that the clothes were not what Le was wearing when she entered the building . Lewis said Wednesday that processing of the building was nearing completion and police would probably clear it Thursday morning . Watch a report on the police saying the killing was no random act » . Le was to have been married Sunday on New York 's Long Island to Jonathan Widawsky , a Columbia University graduate student . Le was from Placerville , California , and seemed to have been aware of the risks of crime in a university town . In February , she compared crime and safety at Yale with other Ivy League schools for a piece for B magazine , published by the medical school . Among the tips she offered : Keep a minimum amount on your person . When she walked over to the research building last week , she left her purse , credit cards and cell phone in her office . CNN 's Tom Foreman , Mary Snow and Shirley Zilberstein contributed to this report .
NEW : Suspect appears in court , does n't enter plea ; October 6 court date set . Bond for Raymond Clark set at $ 3 million , police say . Police chief describes crime as a case of workplace violence . Le 's body was found on what would have been her wedding day .