Updated at 4:27 a.m. ET: BEIJING -- China's ruling Communist Party took a big step towards sealing the fate of fallen politician Bo Xilai on Monday, when a court jailed his former police chief for 15 years over charges that indicated Bo tried to derail a murder inquiry.
The court in Chengdu in southwest China handed down the sentence against Wang Lijun after finding him guilty on four charges, including seeking to cover up the November 2011 murder of a British businessman, Neil Heywood, by Bo's wife, Gu Kailai.
The verdict ended the career of one of China's most storied and controversial police officers and moved the party closer to a formal decision on dealing with Bo, whose downfall has shaken a leadership handover due at a party congress as early as next month.
"Wang Lijun exposed clues of major law-breaking and crimes by others," said the court verdict, according to the Xinhua news agency. It did not say who those other people were.
"He rendered a major contribution, and according to the law he can receive a lighter sentence," said the court. Wang could have received life imprisonment, or even a death sentence.
The relatively mild sentence -- following official confirmation that Wang shared incriminating clues and that Bo beat him after Wang confronted him over the murder allegations -- added weight to predictions that the party will move to jail Bo too, said He Weifang, a law professor at Peking University who has closely followed the case.
"The legal net around Bo Xilai has been slowly tightening," said He. "He'll certainly face a criminal trial."
In August, Gu was sentenced to a suspended death sentence, which effectively means life in prison.
'I let you down'
Experts have offered divided views over whether the party will put Bo before a criminal court or spare him and the leadership that disgrace by simply meting out lighter disciplinary punishment within the party. Some still see that latter course as more likely.
Before Chinese authorities can launch a criminal investigation, the party leadership must first hear the results of an internal investigation and decide whether to hand Bo over. That could happen at a leadership conclave that must take place before the bigger party congress convenes.
The court said Wang, former police chief of southwestern Chongqing municipality, received the sentence for "bending the law for selfish ends, defection, abuse of power and bribe-taking", according to Xinhua.
Wang would not appeal against the sentence, said his lawyer Wang Yuncai, who is not a relative. The sentence could be cut after he serves half his sentence, added Wang, the lawyer. "He accepted the sentence," she said. "He's doing okay."
Xinhua has portrayed Wang as being contrite. "I acknowledge and confess the guilt accused by the prosecuting body and show my repentance," Wang was quoted as saying in court last week. "For the Party organizations, people and relatives that have cared for me, I want to say here, sincerely: I'm very, very sorry, I've let you down."
The scandal that felled both men erupted after Gu murdered Heywood in a hilltop hotel villa in Chongqing, the city where Bo was the flamboyant party chief. Officials have said the murder arose from a business dispute in Chongqing, which Bo and Wang ran as their fiefdom.
Wang had at first helped Gu evade suspicion of poisoning Heywood, hushing up evidence of the murder, according to the official account of Wang's trial.
Slap that 'changed history'
However, in late January, Wang confronted Bo with the allegation that Gu was suspected of killing Heywood. But Wang was "angrily rebuked and had his ears boxed."
"That was a slap around the ears that changed history," said Li Zhuang, a Beijing lawyer who opposed Wang and Bo for mounting a sweeping crackdown on foes in the name of fighting organized crime. "Otherwise, Bo might still be in power and hoping to rise higher."
Days after the confrontation, Bo stripped Wang of his post as Chongqing police chief. The court verdict said several of Wang's subordinates were "illegally investigated."
Wang, fearing for his safety, fled to the U.S. consulate in Chengdu where he hid for more than 24 hours until Chinese officials coaxed him out.
Wang was found guilty by the court of defecting to a U.S. consulate -- along with taking bribes and conducting illegal surveillance -- but only two years of the 15-year sentence were that offense.
It was then that Wang exposed Heywood's murder first to American diplomats and then to Chinese authorities, handing over evidence used to convict Gu last month.
"When mafia members break up with their bosses, they can attempt to seek police protection. But in Chongqing and for the former police boss, there was nowhere to turn," prominent editor Hu Shuli wrote in a commentary posted on the website of her magazine, Caixin. "And this perhaps encapsulates one of the greatest embarrassments of the country's current legal system."
In March, Bo was sacked as Chongqing party boss, and in April he was suspended from the party's Politburo, a powerful decision-making council with two dozen active members.
So far, Bo has been accused only of breaching internal party discipline, and his defenders have accused foes of exploiting the charges against Gu to topple Bo. He had not been given a chance to defend himself publicly since his fall in March.
Ding Xueliang, a China expert at Hong Kong's University of Science and Technology, said those in the party leadership who wanted Bo out might push to reward Wang for exposing the corrupt and lawless inner workings of Bo's administration.
"Despite the many terrible things that Wang Lijun did before, he, in my view, contributed enormously to the legitimacy of the Communist government," Ding said. "This kind of local emperor style of Bo Xilai, it is a cancer of the system, and Wang Lijun helped the top leadership to deal with the fundamental disease before it's too late."
More world stories from NBC News:
- Report: Riots break out at Foxconn factory in China
- Pakistan:$100,000 bounty for death of maker of anti-Prophet Muhammad film
- Many Muslims denouncing anti-Islam film decry violent protests, too
- Protesting Libyans overrun militia headquarters
- Thousands descend on Dutch town after Facebook invite goes viral
- Video: US Marines confront challenges in Afghanistan
- Stay informed: Sign up for our newsletter