A man wrongly convicted and imprisoned for nearly 40 years in the killing of his girlfriend and her four-year-old son reached a $21m (£16m) settlement with the city of Simi Valley, California over the weekend.

Craig Coley, 71, was released from prison in 2017 after DNA evidence and another investigation proved the man’s innocence. Then-Governor Jerry Brown pardoned Mr Coley.

The large-sum settlement agreement will also cover the arduous, costly and unneeded legal proceedings, Simi Valley officials told the Los Angeles Times.

“While no amount of money can make up for what happened to Mr Coley, settling this case is the right thing to do for Mr. Coley and our community,” city manager Eric Levitt said in a statement.

Simi Valley will be paying $4.9m (£3.75m) whereas the rest of the settlement will be paid out by insurance and other revenue sources.

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Last year, the state approved a separate $2m payment for Mr Coley.

The 71-year-old spent 39 years in prison after he was wrongly convicted of killing Rhonda Wicht, 24, and her toddler son in 1978.

Simi Valley’s police chief and Ventura County’s district attorney requested the then-governor Mr Brown to pardon Mr Coley following results from forensic tests proving that his DNA was not on the victim’s bed sheet.

The contained DNA came from an unknown man.

Mr Coley had an alibi for the time of the killing. Investigators disproved eyewitness testimonies that placed him at the scene of the slayings.

His parents died while he was still behind bars. They mortgaged their home to pay for his legal bills.

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Ron Kaye, Mr Coley’s attorney, said the settlement offers only a little bit of closure and vindication for his client. He added that no amount of money could pay back the time and life he missed while being falsely imprisoned.

“He now can live the rest of his life, which we hope will be really well into the future, with the security he deserves,” Mr Kaye told the Associated Press.