CNN  — 

In a sharp turn of events, a San Francisco judge slashed a dying cancer patient’s $250 million punitive award from Monsanto down to $39 million.

Former school groundskeeper Dewayne Johnson was the first of thousands of plaintiffs to take Monsanto to trial, claiming its popular weedkiller Roundup caused non-Hodgkin’s lymphoma.

Jurors sided with Johnson and awarded him $250 million in punitive damages (to punish Monsanto) and about $39 million in compensatory damages (for Johnson’s lost income, pain and suffering).

The jury’s verdict came in August. But on October 10, the tide appeared to turn in Monsanto’s favor.

That’s when Superior Court Judge Suzanne Bolanos issued a tentative ruling granting Monsanto’s request for a JNOV – a judgment notwithstanding verdict. That’s basically when a judge in a civil case overrules the jury’s decision.

Bolanos said the plaintiff “presented no clear and convincing evidence of malice or oppression to support an award of punitive damages.” In other words, Johnson’s entire $250 million punitive award was in jeopardy.

The judge gave attorneys on both sides a few days to respond and further make their cases.

When she issued her final ruling Monday, Bolanos reversed her tentative ruling and denied Monsanto’s request for a JNOV.

But it wasn’t a complete victory for Johnson. Instead of $289 million in combined damage awards, Johnson is slated to get a total of about $78 million.

Johnson's doctor said he had lesions over 80% of his body. Monsanto said there's no evidence Roundup causes cancer.

Bolanos said the punitive award was too high and needed to match Johnson’s $39 million compensatory award.

“In enforcing due process limits, the court does not sit as a replacement for the jury but only as a check on arbitrary awards,” Bolanos wrote in her ruling Monday.

“The punitive damages award must be constitutionally reduced to the maximum allowed by due process in this case – $39,253,209.35 – equal to the amount of compensatory damages awarded by the jury based on its findings of harm to the plaintiff.”

Monsanto had also requested a new trial on the punitive damages. The judge said that request will be denied if Johnson accepts the smaller punitive award. If he does not accept the $39 million punitive award, then a new trial would be set.

The $211 million plummet in Johnson’s punitive award caught some legal