A former longtime Boston television news anchor claims has claimed Kevin Spacey sexually assaulted her then-18-year-old son last summer and that police are now investigating the alleged incident.

Heather Unruh revealed the shocking claim during a press conference on Wednesday alongside her daughter and attorney Mitchell Garabedian, who is best known for representing the victims of the Catholic church sex abuse scandal.

While explaining what allegedly happened, Unruh tearfully said: 'In July 2016, Kevin Spacey assaulted my son. It happened late at night in the Club Car restaurant.

'The victim, my son, was a young, starstruck 18-year-old who had no idea this famous actor was an alleged sexual predator or that he was about to become his next victim.

'Kevin Spacey had no right to sexually assault him.'

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Former news anchor Heather Unruh (above) claims that Kevin Spacey sexually assaulted her then-18-year-old son last summer and now police are investigating the alleged incident. She tearfully recounted what happened to him during a press conference on Wednesday (above)

While explaining what allegedly happened, Unruh tearfully said: 'In July 2016, Kevin Spacey assaulted my son... The victim, my son, was a starstruck 18-year-old who had no idea this famous actor was an alleged sexual predator or that he was about to become his next victim'

Unruh said: '... Kevin Spacey (left) put his hands down my son's pants and grabbed his genitals.' Unruh said her son (right) is a sophomore in college

She claims that her son, who was not of legal drinking age, told the actor that he was in fact old enough to drink alcohol when they met in the restaurant.

'Kevin Spacey bought him drink after drink after drink. And when my son was drunk, Spacey made his move and sexually assaulted him,' she emotionally said.

'... Kevin Spacey put his hands down my son's pants and grabbed his genitals.

'My son panicked, he froze. He was intoxicated.'

Unruh, who did not name her son who was not present at the press conference, said that the actor then left to use the restroom when a concerned woman came to his side and asked if he was okay, to which he said he wasn't.

'She told him to run and he did. He ran as fast as he could, to his grandmother's house. He woke up his sister Kyla and the two of them called me that night here in Boston,' Unruh said tearfully.

The incident allegedly happened at the Club Car (file above) restaurant on Nantucket Island

She said that her family was encouraged to come forward after dozens of women spoke out publicly to accuse movie producer Harvey Weinstein of sexual misconduct. She said: 'I want to see Kevin Spacey go to jail'

'The next morning I joined my family on Nantucket. Nothing could have prepared my son. It harmed him and it can not be undone.

'He has tried his best to deal with it, as he says it's always there and continues to bother him.

'All of us have had sleepless nights and tremendous anger.'

Unruh said: 'I want to see Kevin Spacey have the hand of justice come down on him'

Garabedian and Unruh thanked the unknown woman who encouraged her son to leave the restaurant and asked her to come forward.

'I don't know how much she saw. I don't know if she saw Kevin Spacey put his hand in my son's pants. That much I don't know,' Unruh said. 'What I do know is that she saw my son was very shaken.'

Unruh said that her family was encouraged to come forward after dozens of women spoke out publicly to accuse movie producer Harvey Weinstein of sexual misconduct.

'I want to see Kevin Spacey go to jail,' Unruh said. 'I want to see Kevin Spacey have the hand of justice come down on him.'

In delivering a message straight to Spacey, Unruh angrily said: 'Shame on you for what you did to my son. And shame on you for using your apology for Anthony Rapp to come out as a gay man.

'That was an appalling attempt to turn attention away from what you actually are - a sexual predator.'

The mother also said that her son did not report the alleged incident to police at the time because of 'embarrassment and fear.'

'He knew the kind of attention he would get about making a public accusation,' she said of coming forward last summer. 'This is not the kind of attention my son or family wanted.

'The climate in this country is changing and there’s a shift. There’s less victim blaming going on right now.

'I was really emboldened by the victims in the Harvey Weinstein case. They are astonishingly brave women.'

On October 13, Unruh first tweeted that the Weinstein scandal had given her the courage to accuse Spacey, 58, of attacking a loved one

But she said that her son filed a police report last week and handed over evidence to Nantucket police who are now investigating.

It's unclear what type of evidence was provided. Unruh also said that she knows of at least one other person on the island who had a similar experience with Spacey.

Spacey has not commented on Unruh's claim.

Unruh first tweeted the accusation on October 13 saying that the actor 'assaulted a loved one.'

Unruh, who previously worked at WCVB-TV, tweeted back on October 13 that the Harvey Weinstein sexual assault scandal 'has emboldened me– #truth time. I was a Kevin Spacey fan until he assaulted a loved one. Time the dominoes fell.'

More than two weeks later, after several other allegations against Spacey were made public, Unruh tweeted:' The dominoes are falling. My loved one will speak when ready. The #headline is #KevinSpacey the #predator- this is not about him being gay.'

Unruh made her damaging claims more than two weeks before Star Trek actor Anthony Rapp got an apology after he said the actor, then 26, tried to seduce him when he was just 14.

At the time, Unruh declined to give any more details about the alleged incident only adding: 'My intent was to encourage a badly needed investigation and conversation' and used the hashtag #It'sNotOk.

She told The Boston Globe on October 13 that the alleged incident involving Spacey and her relative happened at a restaurant where the actor did something under a table that was 'completely unexpected, completely inappropriate.'

Unruh first made her damaging claims more than two weeks before Star Trek actor Anthony Rapp got an apology after he said Spacey, then 26, tried to seduce him when he was just 14

She did not provide further details, but told the Globe: 'If a woman who saw what happened didn't tell [the alleged victim] to run while Spacey got up to go to the bathroom, I don't even want to think about what would've happened.'

The Oscar-winner is facing growing allegations of sexually assaulting teenage boys.

Spacey says he is now 'taking the time necessary to seek evaluation and treatment' after the latest round of sex assault allegations and DailyMail.com has learned that he has checked into The Meadows facility in Arizona, the same facility where Harvey Weinstein has sought treatment.

Spacey, who was aged 26 at the time, allegedly invited Rapp to his apartment for a party in 1986. Rapp said that he went to watch TV in Spacey's bedroom until after midnight because he became bored. Spacey is pictured above in 1986 in Heartburn

Spacey's downfall started in late October when actor Anthony Rapp accused him of making a sexual advance towards him in 1986 when he was 14 and Spacey was 26. His claim has been followed by others making similar accusations.

'He picked me up like a groom picks up the bride over the threshold,' Rapp told BuzzFeed News. 'But I don't squirm away initially, because I'm like. "What's going on?" And then he lays down on top of me.

'He was trying to seduce me,' the Star Trek: Discovery actor added. 'I don't know if I would have used that language. But I was aware that he was trying to get with me sexually.'

The House of Cards star apologized to Rapp on October 29, saying he did not remember the incident after more than 30 years.

He said in a statement: 'But if I did behave as he describes, I owe him the sincerest apology for what would have been deeply inappropriate drunken behavior.'

He then claimed that Rapp's claim 'has encouraged me to address other things in my life,' saying that though he had had relationships with both men and women, 'I choose now to live as a gay man.'

He was immediately slammed by gay activists for only coming out in a bid to divert attention from the severity of his alleged actions. Sarah Kate Ellis, president of the LGBTQ group GLAAD said he only revealed he is gay 'to deflect from allegations of sexual assault.'

'This isn't a coming out story about Spacey, but a story of survivorship by Anthony Rapp & those who speak out about unwanted sexual advances,' Ellis tweeted.

Lesbian writer Jenny Hagel said on Late Night With Seth Meyers: 'I have a lot of problems with Kevin Spacey's statement.

'It is inappropriate to respond to an accusation of pedophilia by saying I'm gay,' she added, saying his statement appeared to be 'justification for a crime.'

And gay advice columnist Dan Savage tweeted: 'I'm sorry, Mr. Spacey, but your application to join the gay community at this time has been denied.'

Since Rapp made his allegations, Spacey has been hit by at least 10 other claims. Richard Dreyfuss' son Harry called him 'a sexual predator' in an article he wrote for BuzzFeed.