Deportation is now a lot easier.
Previously, if a permanent resident was convicted of a crime in Canada and received a sentence of at least two years and the crime carried a maximum sentence of ten years, then the permanent resident could be deported for serious criminality. There would be no right of appeal. If the conviction was less than two years, then the permanent resident could appeal – usually on humanitarian and compassionate grounds.
That has now changed. A permanent resident who receives a sentence of six months or more can be deported without any appeal rights. Additionally, a permanent resident who is convicted outside of Canada cannot appeal at all if the criminal act would have been punishable by 10 years or more of imprisonment if committed in Canada.
You can read more on the Citizenship and Immigration website.