TORRANCE, Calif. (AP) — A Japanese businessman cannot be tried for murder in the 1981 shooting death of his wife, but prosecutors may proceed with a charge of conspiracy to commit murder, a judge ruled Friday.

The ruling in the case of Kazuyoshi Miura by Los Angeles County Superior Court Judge Steven Van Sicklen came after he considered a defense motion to quash the man's arrest warrant. Miura, 61, is in custody in the U.S. territory of Saipan.

The judge ruled against the murder element of the case because Miura had already been convicted in Japan of his wife's murder — a verdict that was ultimately overturned. California double-jeopardy rules prohibit someone being tried twice for the same crime.

But Van Sicklen found that Miura had never been tried for conspiracy.