Mumbai police have recovered a knife allegedly used in a fatal stabbing on a local train, following leads tied to a viral video and information provided by a hotel staff member. According to reports, the accused, identified as Roshan Suvarna, was arrested after the stabbing of a co-passenger during an argument aboard the Mumbai local. Investigators say a viral video helped them track the case, while a restaurant or hotel manager alerted police after staff found the weapon. Police recover the knife and the matter shifts to establishing how it was handled after the incident. The accused tells investigators he had carried the weapon for months and discarded it after the stabbing. Police extend his custody as they continue questioning him to determine his motive and to check his past activities. Authorities also examine whether the knife was used previously or was connected to any earlier incidents, with the investigation continuing while custody is extended.