Kim Kardashian has angered the mother of an 11-year-old boy who was killed by the man the reality star is trying to get freed from a California prison.

On Thursday, Kim posed for a photo alongside convicted killer, Kevin Cooper, 61, who is on death row at the notorious San Quentin prison after launching a legal campaign to secure his release.

She spent two hours talking with the quadruple murderer in an 'emotional' meeting that has Kim convinced Cooper has been framed.

But Mary Ann Hughes, the mother of Christopher Hughes, who was one of the four people killed in 1983, says she's disgusted by the thought of Kim trying to help Cooper.

'It makes me feel sick to my stomach and I pity her,' Hughes told TMZ. 'For what she's doing to us, there's nothing to justify what she's doing to us, the immense pain she is causing us.'

Kim Kardashian has angered Mary Hughes (right), the mother of, Christopher Hughes (seen on the photo right), 11, who was killed by Kevin Cooper (left with Kim on Thursday) in 1983. Kim is on a mission to get Cooper freed from a California prison

Kim took to Twitter to reaffirm her stance on Cooper's innocents on Friday

After meeting with Cooper for the first time in person, Kim tweeted on Friday: 'I had an emotional meeting with Kevin Cooper yesterday at San Quentin's death row. I found him to be thoughtful, honest and I believe him to be innocent of the crimes for which he was convicted.'

In a second tweet, she wrote: 'I am hopeful that Kevin will be exonerated since DNA testing has now been ordered on Kevin’s case and I remain grateful to Governor Newsom for ending capital punishment in California.'

Hughes says she believes that Cooper's attorneys 'are using her for her reality show status because they can't use the truth to try to help Kevin Cooper.'

'The truth just condemns him,' she told TMZ.

Hughes' son, Christopher, was killed in 1983 while he was staying at a friend's house.

He was murdered alongside Douglas and Peggy Ryens and their 10-year-old daughter Jessica, at their house in Chino Hills in San Bernardino County.

Hughes says she believes that Cooper's attorneys 'are using her [Kim] for her reality show status because they can't use the truth to try to help Kevin Cooper'. He was convicted in 1985 of murdering two children and two adults

Hughes said that it's obvious that Kim has 'not read all of the actual evidence'.

'She has bought into half truths perpetrated by the defense. If she actually sat down and read the transcripts of all the trials and appeals, she would be sick to her stomach to be in the same room with him,' Hughes told TMZ.

Ever since his arrest, Cooper has vehemently protested his innocence.

Family photo of Peggy, Doug, Jessica and Joshua Ryens, who was the lone survivor of a hatchet attack in 1985

The California man has been fighting to have evidence in his case re-examined for years, with San Bernardino Count District Attorney Michael Ramos filing a 94-page response to one such petition for executive clemency in May of 2018, arguing against retesting in Cooper's case.

In October, Kim asked then-Governor of California Jerry Brown to re-open Cooper's case to investigate new potential evidence that may prove he's not the responsible culprit, prompting Brown to conduct a DNA test on Cooper and evidence found at the scene.

California's new Governor, Gavin Newsom - who is staunchly against capital punishment - ordered additional testing in February.

Kim stopped by the maximum security facility last week to get to know Cooper while the pair anxiously await the results.

During Cooper's appeal, testing of evidence, including a t-shirt believed to have belonged to the killer, was found to have his blood - and test tube preservative on it.

This indicated the blood on the shirt could had been put there from the inside of a test tube that contained Cooper's blood, not splattered on during the quadruple murder.

Advocates argue that the San Bernardino Sheriff's Department tampered with DNA evidence to frame Cooper and that this evidence – found on a t-shirt Cooper says he never wore — should be retested.

Witnesses also said they had seen three white men driving what was believed to be the family car away from the home, but cops focused on Cooper instead.

Cooper has been awaiting death since 1983 for the grisly murders

A source said she stayed at San Quentin (pictured) for several hours meeting inmates and staff

While Cooper is Kim's latest recipient of good will, she began her social justice bids by petitioning President Donald Trump over the release of Tennessee grandmother Alice Marie Johnson in June of last year.

Since Johnson, age 63, was pardoned by Trump after meeting Kim at the White House, she has joined campaigns to get other prisoners released.

Some of Kim's campaigns have been well-publicized, such as her advocacy for former sex slave Cyntoia Brown, Jeffrey Stringer and Johnson, who spent 21 years in prison for a non-violent drug offense before she was freed.

Kim met Trump (pictured) to highlight the case of Alice Johnson, prompting her release

In May, Kim helped get Stringer, from Miami, out of prison after he was locked up for more than two decades for a low-level drug case.

At the time, she tweeted that she helped fund his case after he had been sentenced to life in prison.

Kim also joined celebrities such as Cara Delevigne and Rihanna in calling for Brown, who served 12 years in prison for killing a man who paid her for sex when she was just 16, to be released.

Additionally, Kim has helped free 16 more male inmates who were serving life sentences for federal drug charges between February and May by secretly funding a criminal justice campaign started by the Buried Alive Project, it was revealed by TMZ in May. Her advocacy for Stringer was part of this campaign.

The Buried Alive Project has tweeted updates on those it has helped free as part of its 90 Days of Freedom campaign, following Trump's signing of the First Step Act into law in December. The act allows some people who have been imprisoned on federal drug offenses, particularly those serving life sentences, to seek sentence reductions.

Beneficiaries of the program have included Terrence Byrd, Jamelle Carraway of Illinois and Eric Balcom from Florida.

Kim with Alice Marie Johnson, who was pardoned by Trump after he met with the reality star at the White House in June of 2018

Byrd served 25 years in a federal prison for drug possession charges, Balcom was sentenced to life without parole over a drugs charge when he was 29 and Carraway served 11 years of a life sentence for cocaine possession.

After her successful campaign to get Johnson out of jail, Kim became interested in criminal justice as a potential career path.

The Keeping Up With The Kardashians star has since registered with the California State Bar to study law to become a full-fledged lawyer.

Kim must also complete 60 college credits and then work as an apprentice at a law firm in San Francisco with the intention to take the Bar Exam in 2022.