The accused, identified as Sapan Pramanik (49), was arrested today, station house officer of Mana police station Virendra Shrivastav told PTI.
The incident took place on August 6, when last rites of another woman inmate who committed suicide were being held.
While others were attending the rites, the accused found the victim alone in a room and allegedly raped her, the SHO said.
Pramanik had recently moved into the shelter home for destitute families which stands on the premises of the old age home with his wife and child.
Pramanik has been booked for rape under section 376 of the IPC. Probe is on.
