While accused Monty was arrested from BRT corridor on July 13, Athar was caught from Tigri area on the same night. The third accused, Ravi, was arrested the next day and the knife allegedly used in the murder was recovered from him, Deputy Commissioner of Police (South) Ishwar Singh said.
Arti was found murdered in her rented accommodation at Duggal Colony on July 9 with blood stains found splashed from first to third floor and the walls of her building.
A heated exchange ensued between Arti and Monty. In a fit of rage Ravi grabbed the woman while Monty allegedly stabbed her on the neck even as another girl, who was present in the room, managed to escape from the spot, said the officer.
Police tracked down the witness of the incident who helped them in solving the murder case.