The family of British-born mother-of-two Katie Walker, 46, are offering a A$5,000 reward for information after she vanished in broad daylight in Sydney's eastern suburbs in May 2026. Police suspect she may have taken her own life, but her family and friends dispute this, arguing that someone would have noticed a distinctive-looking woman entering the sea in high heels at lunchtime in a busy tourist area, and they have grown frustrated with the level of communication from New South Wales Police.

Ms Walker was last captured on CCTV walking in Tamarama at 1.12pm on Saturday 23 May, wearing high-heeled boots and a black coat and carrying a designer handbag; she was reported missing nine days later after her father in the UK and her Australian ex-partner realised no one had heard from her. Investigators note she had two packed suitcases at her rental flat, had enquired about flights out of Australia, and her phone last pinged near Bondi around six hours after she was last seen. Her family has since hired a private investigator, and separate reports describe suspicious deletions of her online accounts and photographs, alongside accounts from friends and her ex-husband suggesting she changed dramatically and may have been followed or targeted, with one friend raising fears she could be a victim of human trafficking.