The portraits are crudely drawn, as you might expect of a self-taught artist pushing 80. They are bright and primitive, but if you look at them more closely, they take on a shocking individuality.

A man who authorities believe strangled dozens of women as he moved from place to place around the US has been convicted of three 1980s murders in Los Angeles.

Detectives across the US are scouring cold case files for possible ties to a man arrested on suspicion of killing three women — fearing he may have killed scores of people.