Who was the first Canadian serial killer?

The first recognized Canadian serial killer is considered to be John Wayne Gacy, although he primarily operated in the United States. In Canada, the first notable serial killer is often identified as Albert Fish, who was active in the early 20th century. However, more widely recognized cases in Canada began with the likes of Paul Bernardo and Karla Homolka in the late 1980s. It's important to note that the identification of "first" can vary based on definitions and criteria for serial killing.