Small sections were redacted, including a description of Ms. Le's body when it was found.
But it was not until Sept. 13 that Ms. Le's body was found, after investigators detected an odor.
The investigators removed a panel in the wall above a toilet and found Ms. Le's body.
A researcher at another Yale lab in the building where Ms. Le's body was found said that Mr. Clark had not been at work for several days.
Ms. Le's body was found stuffed behind a research lab wall on the day she was supposed to get married in September 2009.
Earlier in the week, Chief Lewis said the police had interviewed 150 people and watched 700 hours of surveillance video from cameras in and around the building where Ms. Le's body was found — and where Mr. Clark worked.
Neighbors said that on Sunday afternoon, around the time Ms. Le's body was discovered, he left with his companion, who is also a technician at the Yale lab.
The affidavit laid out evidence the police had collected, including a bloody sock with the DNA of both Ms. Le and Mr. Clark on it; a pair of bloody boots marked "Ray-C" that were missing their laces; and a green pen that was found with Ms. Le's body when the authorities eventually discovered it hidden behind a wall.
Early Thursday, a New Haven police spokesman, Officer Joe Avery, said that investigators were on the verge of arresting Mr. Clark, 24, in the killing of one of those graduate students, Annie M. Le, whose body was found on Sunday, the day she was to be married, behind a wall in the building where they had worked.
Le, whose body was found Sunday behind a wall in a basement laboratory, worked in the Amistad Street Building, a four-story building in the medical school complex a mile from Yale's main campus.
