Police Notice 91crpc and 174 IPC action

When you mention nothing has been done by the police, does it mean no F.I.R. has been registered? Or if it has been, do you feel the police are not taking appropriate steps for commencing investigation into the matter?

In case of lack of an F.I.R., the matter can be reported to the Superintendent of Police by a written application [s-154(3), CrPC]. If it's for want of proper investigation, you may even file an application before any judicial magistrate [s-156(3), CrPC].

As to the notice served under s-91 of CrPC, as long as the son had not departed from the town after the notice was issued to him by the police, there's no likeliness of him being charged under s-174, IPC (non-attendence should be intentional for the purpose of the aforesaid section.) However, best to inform the police of the circumstances so the son doesn't appear to have absconded.