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Police have released CCTV footage in an effort to track down a couple who may have seen an Invercargill man missing for more than a month.
Senior Constable David Loader said despite an extensive search, Mr Horn not yet been located.
Police had previously released CCTV footage showing Mr Horn walking in Queens Park on the morning of 15 February, between approximately 10.20am and 11am.
Today they released CCTV footage of a couple who were in Queens Park later that day in an effort to identify and speak to them.
"They may have seen Raymond and be able to provide valuable information regarding his movements that day."
Anyone with information that can help us identify the couple in the CCTV footage is asked to contact Police on 105 and quote file number 210215/8028.