Police are seeking information for the whereabouts of a 44-year-old man.
Laurie John Junior Dodd escaped legal custody while at Royal Perth Hospital around 12.40pm on Saturday.
He is described as 187cm tall with a medium build, fair skinned and black hair in a mullet style.
Mr Dodd was last seen wearing green or black boxer shorts and a white t-shirt.
It is believed he may have facial and arm injuries that may be bandaged.
He was last seen in the Perth CBD area.
Members of the public are advised not to approach him but should contact police immediately on 131 444.