The Supreme Court has upheld a high court acquittal of Kazuyoshi Miura over the death of his wife in the early 1980s, it was learned Thursday.

Prosecutors have until midnight Monday to lodge a complaint against Wednesday's ruling. Given that no complaint has ever led to a ruling being overturned, the top court has effectively finalized Miura's acquittal in the high-profile murder case.

Miura, 55, was charged with arranging the murder of his wife, Kazumi, 28, so he could collect 163 million yen in insurance money. She was shot in Los Angeles in November 1981. There were no witnesses. She eventually slipped into a coma and died in 1982 in Japan.