The police on Saturday arrested Sulakhan Singh, alias Babbar Sultan, one of the main accused in the Nabha jailbreak.
The gangster from Mattewal in Amritsar was the first to enter the jail in a car, while posing as a cop to facilitate the escape of six inmates in November last year.
Inspector general of police (IGP) Arpit Shukla said the crime investigation agency (CIA) staff, acting on a tip-off, nabbed the gangster at the local bus stand while he was planning to flee in a Chandigarh-bound bus.
Sulakhan along with other gangsters, also posing as cops, pretended to be shifting a criminal to the high-security jail.
Of the six escapees, Khalistan Liberation Force chief Harminder Mintoo and gangsters Amandeep Singh Dhotian, Kulpreet Singh, alias Neeta Deol, and Gurpreet Singh Sekhon have been rearrested, said Shukla . Gangster Harjinder Singh, alias Vicky Gondar, and militant Kashmir Singh are still at large.