Perth man admits killing mother of two

A man has pleaded guilty to murdering a mother of two who went missing from Perth's southern suburbs in September last year.

Keith Edward Earnshaw, who is in his early 40s, entered the plea in Stirling Gardens Magistrates Court on Wednesday via video link from Hakea Prison.

He is accused of murdering Helen Rocha, who was last seen leaving her Willagee home with a man in a white hatchback on September 26.

Earnshaw has been remanded in custody and will be sentenced in the Supreme Court on October 7.