Police also revealed today that Miss Liu's laptop did not have a built-in camera and that they believe an external webcam is also missing.
A mobile phone, recovered at the scene, is undergoing forensic examination, but Miss Liu’s personal mobile phone is believed to be missing.
"We'd really like to find her laptop," Const Tony Vella from Toronto Police said. He added the webcam investigation was "definitely a first" and that Miss Liu knew the suspect but the long-distance witness does not.
"It looks targeted, but we'll still look into all possibilities at this point and it's important to keep an open mind in this case," Const Vella said.
Asked why it took over 10 hours for police to arrive at the crime scene, Const Vella explained that police were not notified until Friday morning.
"Someone had gone to (her) address because they were concerned for her well-being and they went into the apartment and they found her there and they were concerned so they contacted police," he said.
"We responded on the Friday at 11am and that's when we were first made aware of the situation."
A team from the Chinese consulate arrived soon after the police after receiving an urgent phone call from the victim's distraught mother in China.
"The family said (the mother) got the news maybe the daughter is in danger," Consulate spokesman Huang Xihua said.
"They don't know whether she died, just that she's in danger."
York President and Vice-Chancellor Mamdouh Shoukri said the university's "deepest condolences and heartfelt sympathy went go out to Liu's family, friends and classmates."
"Qian's death is a terrible tragedy and our entire community mourns the loss of a promising young student," he said.
The community is still recovering from a separate attack where a young woman was beaten in a university bathroom in what was described as a homophobic assault.
University spokeswoman Susan Webb said she was concerned about the proximity of the attack to the campus: "We're doing everything possible to make this a safe environment. It can be a challenge when we don't have any authority off campus."
Although the crime is believed to be Canada's first murder caught on a webcam a woman from Lebanon, Pennsylvania was shot dead while chatting online in 2009.
A friend on the video call saw Meleanie Hain's husband firing a gun and police later found both Hain and her husband dead in their home.