In 2002 the Limitations Act, 2002 s.4 repealed the Public Authorities Protection Act, s.7 and allowed for a two year limitation period for actions against, amongst other public authorities, police services in Ontario. Previously the limitation period was six months.
If you settled an action against a police service in Ontario involving claims discovered after December 31, 2003 you may wish to look into whether or not your settlement may have been entered into on the erroneous basis of the previous six month limitation period provided for by the Public Authorities Protection Act for a fraction of the value of the claim. Of course, there is no gurantee that your settlement will be re-opened. However, depending on the factual circumstances of your case you may wish to speak to a lawyer.