The arrestee is Salauddin, 35, son of Tukai Miah.
Ilius Sharif, superintendent of Noakhali Police, said that district detective police arrested Salauddin from his relative house in Feni Sadar Upazila's Sultanpur village at night.
A total of eight culprits have so far been arrested in the case. He was no. 9 accused of the rape case filed with Charjabbar Police Station.