Police are appealing for public assistance to help locate missing 8-month-old Chayse.
Investigators believe the Lalor child may be in the company of his mother Britany and father Che Proctor.
A warrant has been issued for Proctor's arrest for breach of parole after he allegedly removed his ankle bracelet and is avoiding police.
Chayse was last seen in Lalor on 9 February.
Investigators have release images of Chayse, Che and Britany in the hope that someone may recognise them and can provide information on their current whereabouts.
They are known to frequent the Lalor and Mill Park areas.
Anyone with information on their current whereabouts is urged to contact Epping Police Station on 9409 8100, or alternately contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au
