Schedule B - Constitution Act, 1982 (79)
PART I - Canadian charter of rights and freedoms
Legal Rights
10. Everyone has the right on arrest or detention
a) to be informed promptly of the reasons therefor;
b) to retain and instruct counsel without delay and to be informed of that right; and
c) to have the validity of the detention determined by way of habeas corpus and to be released if the detention is not lawful.
Rights during investigation - informed of belief that crime has been committed
Rights during investigation - legal assistance
EDIT.