Date Time Police seek help to find missing person at Libby Skye Shannon Mandurah Police are seeking information regarding the whereabouts of missing 15-year-old girl Libby Skye SHANNON, who was last seen at the Cockburn Train Station on Sunday 28 February 2021. Libby has not had contact with her family since Thursday 18 February 2021, and was reported missing the following week. Concerns are held for her welfare as she has not been away from family for this period of time before. Libby is described as fair skinned, of medium build, with dark hair. It is believed Libby may be in the Mandurah to Fremantle area.