Sum Yee Li, 42, disappeared from her home in East Gwillimbury, Ontario and was last seen on December 26, 2021. A family member reported her missing to Toronto Police on March 29, 2022 after an extended period of no contact; that silence was out of character because she regularly checked in with her son. The York Regional Police Homicide and Missing Persons Bureau later took over the investigation.

Li is described as an Asian female, five feet six inches tall, about 125 pounds, thin build, with long black hair and brown eyes. She used several known aliases, including Helen Chan, Helen Chen, Jojo Lee, Rebecca Li, Jessica Li, Jojo Li, and Yu Li. Investigators say the circumstances have led them to believe she may have been a victim of foul play; she was also known to have traveled internationally and to Western Canada in the past.

Her case remains open and unanswered. If anyone knew Sum Yee Li or has information about her movements after December 26, 2021, please share what you know.