Thirty-four-year-old IIT-Delhi researcher Pushpam Kumar Sinha, accused of murdering 19-year-old Ramchanphy Hongray allegedly after she spurned his advances, was frustrated about not having a girlfriend, and believed that he was finally getting lucky with the Manipur teen who had come to be his neighbour in south Delhi’s Munirka village.

Sinha had been keeping a personal diary since August, recording in it his resentment and sense of unfulfilment at failing to cultivate a relationship with a woman, police said a day after his arrest. Sinha’s neighbours said he was childlike in manner and behaviour, and his best friends in the neighbourhood were children.

It was a search of Sinha’s one-room apartment on the second floor of A-80, Munirka village, that led police to suspect he was a “maniac”, and get on to his trail. Investigators later went through his diary and laptop.

“The graffiti on the walls of his room indicated that he was a pervert and a maniac,” Deputy Commissioner of Police (South), HGS Dhaliwal said. “He had a complex. During searches at Sinha’s room, it came to light that he was suffering from obsessive compulsive disorder. A very vulgar kind of red graffiti was found on a wall of his room.”

Officers close to the investigations said the graffiti mentioned Ramchanphy. “This is the time to make girlfriends. I am finally making one,” Sinha allegedly wrote.

An entry in Sinha’s diary read, “I have got a lot of things in my life and I have achieved a lot. This is the only thing lacking in my life (girlfriends). This is my age of making girlfriends and yet I have not been able to.”

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