Sexual offences must be reported at the police station in the area where the crime took place (If it happened in another town or province, report at the closest police station).
Police are responsible for all aspects of the investigation, they cannot make decisions in which cases can be reported or prosecuted.
You do not need to take the child with you to open the case.
The police will notify the FCS unit who will take the statement of the child.
Wherever possible the child should be supported when giving their statement.
Ask for a copy of the statement and get the details of the investigating officer.
Remember - Disclosure is a process not an event - the police might need to speak to the children several times.