Puzzling case... I don't think much new information has appeared since the article below was published.
"Police are investigating a possible connection between the murder of Toronto teenager Philip Sit and the disappearance of three of his classmates. Mr. Sit's skeletal remains were discovered in a King Township field on Aug. 9 after he had been missing for about 11 months. Five days later, 17-year-old Eve Ho, also known as Yee Wah Ho, went missing with her boyfriend, Jackie Li, 18, and another friend Kevin Lim, 18. "
http://www.canada.com/nationalpost/news/story.html?id=202aff7c-e5f3-4038-88a2-24987f0d1a78&k=64164
http://www.youtube.com/watch?v=PIhnu0-4kyM
"Police are investigating a possible connection between the murder of Toronto teenager Philip Sit and the disappearance of three of his classmates. Mr. Sit's skeletal remains were discovered in a King Township field on Aug. 9 after he had been missing for about 11 months. Five days later, 17-year-old Eve Ho, also known as Yee Wah Ho, went missing with her boyfriend, Jackie Li, 18, and another friend Kevin Lim, 18. "
http://www.canada.com/nationalpost/news/story.html?id=202aff7c-e5f3-4038-88a2-24987f0d1a78&k=64164
http://www.youtube.com/watch?v=PIhnu0-4kyM