After you are arrested, police will take the results of their investigation to the Crown who decides whether to proceed with a prosecution. If you have been charged with an indictable offenceIndictable offences are more-serious criminal offences that carries a sentence of 14 years in prison or more and you choose to have your trial at the Superior Court of Justice, you or the prosecutor can ask for a preliminary hearing.
If you have been charged with a co-accused and one of you asks for a preliminary hearing, you both must attend unless the court agrees to hear your cases separately. This would be done by making a severance application and you or your co-accused would have to prove that it would be unfair to have a single trial.
A preliminary hearing is much like a trial with the Crown tasked with proving there is enough evidence to justify a trial. The prosecution does not have to prove guilt beyond a reasonable doubt, which is the case in a criminal trial.
Typically, the Crown will present the most important parts of the evidence against you and may call witnesses to testify. You are allowed to cross examine any witnesses, call your own witnesses and present evidence. An accused does not have to mount a defence. The hearing is often used as a discovery tool by the defence, giving you the opportunity to look for inconsistencies that can be brought out at trial.
After the Hearing
After the hearing, the court will decide if there is enough evidence to proceed to trial. The judge does not have to be convinced that you are guilty of the crime to commit you to stand trial, only that sufficient evidence exists. The test for proving the case at the preliminary stage is considered low, so cases generally proceed to the next stage. If you are facing multiple offences, the court can order you to stand trial on all of them, dismiss some counts or order a trial on a single count.
If you decide to plead not guilty after the preliminary hearing, the judge will set a trial date. If you are not out on bail you will be held in custody until that time. After hearing the evidence, you may decide to negotiate with the Crown to plead guilty to a lesser offence or strike a deal to drop some charges in exchange for a lesser sentence.
If the case against you is dismissed you are free to go. However, there are rare circumstances where fresh evidence may be presented after the preliminary inquiry and you could be prosecuted again.