One of the three Bollywood Khans, the actor has almost Rs 600 crore riding on him say film industry analysts, and the verdict will affect at least three big projects.
In case the sentence is higher than 3 years, he has to approach the higher courts, and will be taken to Jodhpur Central jail immediately.
The prosecution also said that "Salman Khan was a habitual offender" citing another case in which he had allegedly mowed down people sleeping on a footpath in Mumbai.
Meanwhile, the actor who pleaded not guilty to the charge can still appeal the case.
He will be sentenced later Thursday and faces between one and six years in prison for the crime that has gripped cinema-obsessed India for decades.More news: United Kingdom lab says can not determine spy nerve agent was Russian-made
Today he's considered one of India's biggest celebrities - to the point where he's often mobbed whenever seen in public - and despite his brushes with the law, is still one of Bollywood's biggest draws.
This is his fourth stint in the Jodhpur Central Jail.
At the time, public prosecutor Bhawani Singh Bhati told the court that all five actors were in a Maruti Gypsy four-wheel-drive vehicle that night, with Salman Khan in the driver's seat.
According to Forbes, he made $37 million in yearly earnings to finish second behind Shah Rukh Khan in the 2017 Bollywood rankings.More news: Prince Philip undergoing hip surgery in London
The case continued from 2002 till 2015, when on May 6, the trial court found him guilty and sentenced him to five years' imprisonment. The community has pursued the case against Khan for nearly two decades and cheered the decision by setting off firecrackers near the courthouse and handing out candies.
Bollywood actor Salman Khan's punishment for the 1998 blackbuck and chinkara poaching case has come as shocker to most. The final punishment will be announced after 1 PM.
Salman was charged under Section 51 of the Wildlife (Protection) Act and others under Section 51 read with Section 149 (unlawful assembly) of the Indian Penal Code.
Killing endangered antelope isn't the only time Salman has hit headlines.More news: Train strike causes travel chaos in France