According to the police, the SI, identified as Ravi Rathi, who is posted with East Delhi's Pandav Nagar Police Station, has gone missing after the matter was reported.
Rathi and the victim are 2010 batch police personnel and met each other during their training and befriended.
A police official said Rahti is already married but he concealed this fact from the victim and proposed her for marriage.
She agreed and both got married at a temple. Rathi then allegedly developed physical relation with the victim.
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The official said the victim was taken to a hospital where her medical report proved that she was raped. Police then lodged a rape case under section 376 of IPC.
Meanwhile, when Rathi, got to know that an FIR was lodged against him, fled from his house. Police conducted raids at his house and a relative's house but he managed to give the cops a slip.