Police said a crime branch team probing the case nabbed Laura from Delhi and he will be further produced before Rohini court for seeking police remand for further investigation.
The judo coach, 32-year-old Subhash, a resident of Kirari Suleman, was arrested from the national capital, a senior police official said.
The international wrestler is facing charges of murder, cupable homicide and kidnapping.
The law student had alleged that Kumar's career and reputation has been damaged by the media's reporting of the case against him in connection with the Chhatrasal Stadium brawl.
The police refused to divulge details about a purported video of the incident which Sushil Kumar had allegedly asked his associate to record.
Kumar was physically produced before the court, following which the police was allowed to interrogate him for 30 minutes.
The Delhi Police recorded the statements of the victims of Chhatrasal Stadium brawl that led to the death of a wrestler, officials said on Sunday.