On December 27, his assistant Abdur Rashid, 27, was arrested from Chhatak upazila by Police Bureau of Investigation (PBI).
The college student jumped off a moving bus at Sujanagar in Sunamganj's Derai municipality area on the evening of December 26 to escape rape attempt by the bus driver and helper.
The injured girl was admitted to Sylhet MAG Osmani Medical College Hospital.
Victim's father filed a case with Derai Police Station accusing three unnamed people the same night.
Stay updated on the go with The Daily Star Android & iOS News App. Click here to download it for your device.