California prosecutors convicted killer Scott Peterson and other death row inmates scammed the state out of millions of dollars in coronavirus unemployment benefits, according to a report.

In total, nearly $1 billion may have been paid out to people who were behind bars and ineligible for the benefits, the prosecutors claim.

It is “the most significant fraud on taxpayer funds in California history,” nine local district attorneys said in a letter obtained by The Los Angeles Times, which first reported the allegations.

Investigators found that more than $400,000 in state benefits were paid to death-row inmates, including Peterson, who is behind bars at San Quentin State Prison for the 2002 murder of his wife, Laci, and their unborn son, according to the report.

More than $140 million was sent to other inmates in California’s 38 prisons, said Sacramento County DA Anne Marie Schubert, who helped lead a task force that discovered the alleged racket.

The alleged con took many forms: some claims were submitted directly by inmates or by their family and friends, while other prisoners were unwitting victims, the prosecutors said.

“The murderers and rapists and human traffickers should not be getting this money,” said Schubert. “It needs to stop.”

Gov. Gavin Newsom on Tuesday announced a task force to tackle the alleged abuse.

“Unemployment fraud across local jails and state and federal prisons is absolutely unacceptable,” the governor said in a statement.