Canadian investigators have arrested a 29-year-old man in the death of a student from Beijing, who was last seen alive on a webcam by her boyfriend in China as she struggled with an attacker.

Brian Dickson has been charged with first-degree murder, said Toronto police spokesman Tony Vella. Dickson is scheduled to appear in court tomorrow.

Police said the body of York University student Liu Qian, 23, was found Friday in her apartment in Toronto a few hours after her boyfriend in China witnessed the attack. She was naked from the waist down and there were no obvious signs of sexual assault or trauma that would have led to her death.

Liu was chatting with her boyfriend, Meng Xianchao, by webcam at about 1am Friday when a man knocked on the door, police said.

Meng reported seeing a struggle break out between the two before Liu’s webcam was shut off. The friend contacted other friends in Toronto who in turn called police.

The victim’s father, Liu Jianhui, said his daughter studied at Beijing City University before moving to Canada, where she met her classmate and boyfriend Meng Xianchao.