He had brought a kanwar and was accompanying the group which orchestrated the violence, Kumar said.
Kanwariyas' Vandalism: Delhi Police Make First Arrest, Accused A Vagabond, Drug Addict
During interrogation, Billa told the police that one of the kanwariyas had sustained injury to his hand after the car brushed past him.
A rumour soon spread in the group that the kanwariya had been thrashed and subsequently the others gathered there. Billa was handed a baseball bat by someone and he too got involved, the DCP said.
Sections of rioting have been added to the FIR that was lodged on Wednesday, he said, adding that these are non-bailable sections.
Billa said he does not know the other accused but has told the police about the probable routes they might have taken, Kumar said.
The accused is a vagabond, a drug addict and an orphan and at the time of his arrest, he was wearing the same clothes that he was wearing at the time of the incident, he added.
A ruckus broke out after a grey car being driven by a woman, who was with a male friend, allegedly hit a kanwariya.
A heated argument ensued between the two sides and one of the kanwariyas was allegedly slapped by the male occupant of the car. The kanwariyas then vandalised the vehicle with baseball bats.
A video of the incident, captured by a CCTV camera installed at a shop, showed the kanwariyas breaking the car's windshields, windows and headlights with baseball bats even as a policeman tried hard to stop them.
The rampage came to a halt only after the unidentified miscreants overturned the car in the middle of the road.
The couple fled the scene fearing for their lives and refused to give any complaint in writing, the police had said.
A case was registered and the accused identified on the basis of inquiries conducted by the police and the CCTV footage.