Ram Singh, the sparring partner of Vijender Singh, was remanded in police custody till April 9 by a local court here.
Singh, who has been recently dismissed as Head Constable of Punjab Police, was presented in the court under tight security arrangements.
The court had earlier remanded him till April 7 after he was arrested by the police on last Wednesday.
The boxer was arrested for custodial interrogation after recovery of five kg methamphetamine, a party drug, from the house of his brother-in law Ravicharan Singh in Sangrur last Sunday.
Vijender's name had cropped up in the drug haul case after the SUV of his wife was found outside Kahlon's residence in Shivalik Vihar in Zirakpur when the contraband was recovered.