Annie Le, the Yale Medical Student died of traumatic asphyxiation. After 48 hours and a lot of media pressure they finally released the cause of her death.
Authorities believe Ray Clark is a possible suspect in the murder, and are hoping to link DNA evidence from the lab to him, however no arrest has been made in the case up until now.
"Authorities have finally released the autopsy report on slain Yale graduate student Annie Le, who went missing on Sept. 8, 2009. The state medical examiner says that the promising medical researcher died of traumatic asphyxiation by neck compression. " via CBS News