The California Supreme Court is reconsidering its decision not to overturn the murder conviction of a man charged with the slaying of his wife nearly 20 years ago.

The court issued an order this week asking prosecutors why William Richards' conviction should not be overturned on the basis of a new state law inspired by his case.

The law, which took effect in January, makes it easier for defendants to get their convictions thrown out when experts later repudiate their trial testimony.

Richards was convicted of murder in 1997 in the strangling of his wife after a San Bernardino County jury heard an expert testify that a mark on her hand was consistent with the defendant's teeth.

The expert later said the injury might not even be a bite mark.