Police are investigating the circumstances surrounding an assault in Caroline Springs railway station on February 10.
It is believed the offender arrived at the railway station on a V/Line train about 8,28pm and was removed by Protective Service Officers.
The offender is described as a Caucasian male with long hair wearing green shorts but no shirt.
Anyone with information can contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au.