The respondent was released on a promise to appear and an undertaking.
The Crown failed to lay an information 'as soon as practicable' under s. 505 of the Criminal Code, rendering the promise to appear invalid.
The respondent was subsequently charged with breaching a condition of his undertaking.
The trial judge and summary conviction appeal court acquitted the respondent, holding that the invalidity of the promise to appear also nullified the undertaking.
The Court of Appeal allowed the Crown's appeal, holding that an undertaking serves a different purpose than a promise to appear and remains in force as long as the underlying charges are before the court.
Convictions were substituted, but proceedings were stayed due to delay.