Knox Sexual Offences and Child Abuse Investigation Team detectives are appealing for public assistance in identifying an offender following a sexual assault at a Wantirna South shopping Centre on 15 December.
Investigators have been told a man entered a clothing store and was approached by a female staff member to see if he needed assistance about 1pm.
The man spoke to the victim, before sexually assaulting her and leaving.
Detectives have released CCTV and images of a man who may be able to assist police with their enquiries.
The offender is perceived to be of Indian sub-continental in appearance, aged in his 50s, about 152cm tall with dark hair and eyes.
He was wearing a large blue coat, blue jeans and brown runners.
Any witnesses or anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.auExternal Link.