The eight-year-old boy was confronted by a man inside a toilet block at a shopping centre in Menai about 3pm on Friday (30 October 2015).
The man allegedly photographed the boy inappropriately before the boy fled and alerted his mother.
Police were contacted and officers from Sutherland Local Area Command are investigating the incident.
Following inquiries, detectives have released images of a man they believe can assist with the investigation.
Anyone with information is urged to come forward.
Police are urging anyone with information in relation to this incident to call Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page: https://nsw.crimestoppers.com.au/ Information you provide will be treated in the strictest of confidence. We remind people they should not report crime information via our Facebook and Twitter pages.