Panwar, who was Rathi's neighbour in Bhakra Beas Management Board Colony in Delhi, was arrested from the national capital in January.

According to police, his parents often jibed Ankur for not getting a job despite completing his course and praised Preeti, who had landed a job at the Navy hospital here.

This made Ankur very jealous and he wanted to harm her face so as to destroy her career, police said.  On May 2, 2013, acid was flung at Rathi when she got down from Garib Rath Express at the Bandra Terminus. She was supposed to join Colaba Naval hospital (INS Ashwini) as a staff nurse.

Having suffered severe damage to the lungs, she succumbed at the Bombay Hospital here on June 1.  

According to the police, Panwar procured the acid on April 2 and boarded the same train by which Rathi and her family were travelling.

He was travelling ticket-less.  

He got the opportunity to throw acid at her when the train arrived at Bandra Terminus.

With his face covered by a handkerchief, Panwar managed to escape after the attack and took the same train back home.

He is facing charges under sections 302 (murder), 326 (voluntarily causing grievous hurt by dangerous weapons or means), 326 B (voluntarily throwing or attempting to throw acid) of the Indian Penal Code.