However, they have since both made themselves known to the police.
Pictured: Matthew Bourgaize.
Mr Bourgaize, who was an in-patient at the Oberlands when he disappeared, has been missing for more than two weeks. He was last seen on CCTV heading from the hospital towards Croutes Havilland and Fort Road. No confirmed sightings have been made since then.
Although the search remains active, Guernsey Police have decided to stop issuing public updates unless there is a major development.
Anyone who believes they may have seen Mr Bourgaize is urged to contact JESCC immediately on 725111.
When he was last seen, Mr Bourgaize was wearing a long coat with a fur hood and grey jogging bottoms.
Pictured top: Matthew Bourgaize.