NEW YORK (NYTIMES) - Star anchor Chris Cuomo was fired by CNN on Saturday (Dec 4), completing a stunning downfall for the network's top-rated anchor amid an ongoing inquiry into his efforts to help his brother, Mr Andrew Cuomo, then governor of New York, stave off sexual harassment accusations.

Until last month, the television journalist had enjoyed the support of CNN president Jeff Zucker and faced no discipline for his behind-the-scenes strategising with his brother's political aides, a breach of basic journalistic norms.

But the anchor was suspended last Tuesday after a new batch of testimony and text messages, released by the New York attorney-general, revealed a more intimate and engaged role in his brother's political affairs than the network said it had previously known. CNN said on Saturday it had enlisted outside counsel to review the prime-time anchor's actions, a sign that its inquiry quickly entered a more serious stage.

"We retained a respected law firm to conduct the review and have terminated him, effective immediately," CNN said in a statement. "While in the process of that review, additional information has come to light. Despite the termination, we will investigate as appropriate."

As the gregarious and sometimes combative host of CNN's 9pm show, Mr Cuomo was at the peak of a broadcast journalism career that he had forged outside of his famed political family. But it was the troubles of his brother, who resigned the governorship in August, that ultimately embroiled the presenter in a controversy that precipitated his dismissal.

"This is not how I want my time at CNN to end, but I have already told you why and how I helped my brother," Mr Cuomo said in a statement on Saturday. "So let me now say as disappointing as this is, I could not be more proud of the team at Cuomo Prime Time and the work we did as CNN's #1 show in the most competitive time slot."

Documents released on Nov 29 revealed that the anchor had offered advice on Mr Andrew Cuomo's public statements and made efforts to uncover the status of pending articles at other news outlets, including The New Yorker and Politico, concerning harassment allegations against the governor.

Mr Zucker - who had been steadfast in backing Mr Chris Cuomo, at one point saying the anchor was "human" and facing "very unique circumstances" - informed the anchor on Saturday that he was being fired. "It goes without saying that these decisions are not easy, and there are a lot of complex factors involved," Mr Zucker wrote in a memo to CNN staff.

The spectacle of a high-profile anchor advising his powerful politician brother amid scandal was a longstanding headache for many CNN journalists, who privately expressed discomfort at actions that, in their view, compromised the network's credibility.

CNN anchor Jake Tapper went public with his concerns in May, telling The New York Times that his colleague had "put us in a bad spot".

"I cannot imagine a world in which anybody in journalism thinks that that was appropriate," Mr Tapper.

Even so, the timing of Mr Chris Cuomo's firing, on a Saturday at 5pm, caught many members of the CNN newsroom off guard.

The network's decision earlier in the week to suspend him had left open the possibility that he might return to the channel at a later date. CNN chief media correspondent Brian Stelter speculated on air last Wednesday that it was "possible he'll be back in January".

The network said on Tuesday it would begin an internal review of Mr Cuomo's conduct. But its executives had not immediately planned to hire an outside law firm, according to a person familiar with the network's internal decision-making process.

That plan changed in recent days, and CNN declined on Saturday to identify the name of the law firm it had retained.

Mr Cuomo has retained public relations executive Ronn Torossian, a veteran New York operator who is an ally of New York City's mayor-elect, Mr Eric Adams.

Before joining CNN, Mr Cuomo spent years as an on-air correspondent, covering wildfires, shooting rampages and war zones, most prominently at ABC News. He was one of Mr Zucker's first major hires after the latter became CNN's president in 2013.

A morning show, New Day, was organised in part around Mr Cuomo's bombastic, fast-talking on-air personality.

The awkwardness of his relationship with Mr Andrew Cuomo - who was among the most powerful Democratic politicians in the country - became apparent almost immediately. In 2013, the network was criticised after Mr Chris Cuomo twice interviewed his brother on New Day.

CNN showed less concern about any ethical issues in 2020, at the onset of the coronavirus pandemic.

By then, Mr Cuomo had moved to prime time, beating out other prominent hosts such as Mr Tapper for the coveted 9pm slot. Cuomo Prime Time became CNN's highest-rated hour, although it regularly attracted fewer viewers than competitors on Fox News and MSNBC.

As governor of New York, Mr Andrew Cuomo was a leading national figure in the pandemic response. Mr Chris Cuomo began interviewing him in prime time, and their teasing banter and emotional conversations became a hit with viewers.

Ratings surged further after the CNN anchor contracted the virus; he continued broadcasting, and interviewing his brother, from quarantine in the basement of his Long Island home.

Mr Zucker praised the segments for their "authenticity and relatability and vulnerability". "That's what the brothers Cuomo are giving us right now," he told the Times in April 2020.

The next year, as Mr Andrew Cuomo was facing a growing number of sexual harassment accusations, the journalist recused himself from reporting on the scandal, leaving a prime-time hole in CNN's coverage of what was turning out to be a national news story.

At the same time, away from the anchor desk, Mr Chris Cuomo was participating in strategy sessions with the governor's top aides. It also emerged that Mr Andrew Cuomo had arranged for his brother's Covid-19 tests to receive priority treatment by the state. CNN did not discipline Mr Chris Cuomo and at one point offered the anchor a leave of absence if he wished to more formally help his brother.

After the governor resigned, Mr Chris Cuomo defended himself on the Aug 16 episode of his programme. "I'm not an adviser, I'm a brother," the anchor said. "I never attacked nor encouraged anyone to attack any woman who came forward. I never made calls to the press about my brother's situation."

But the new batch of testimony and text messages suggested that Mr Chris Cuomo did function as an adviser and did reach out to journalists. "When asked, I would reach out to sources, other journalists, to see if they had heard of anybody else coming out," he told investigators.

On May 20, Mr Cuomo began his CNN programme by apologising to viewers about his conversations with his brother's political team, declaring himself "family first, job second".

"Being a journalist and a brother to a politician is unique, and a unique challenge, and I have a unique responsibility to balance those roles," Mr Cuomo said then. "It's not always easy."