The Class 12 girl was killed with a sickle at Ghar Shayam village in Kandhla police station area of Shamli on Wednesday when she was returning home from college.
Police outpost in-charge Kailash Chand was removed last evening for negligence of duty, Kandhla police station SHO O P Choudhary said.
Yesterday, family members of the girl staged a protest.
The main accused, Amarpal (26), has been arrested and the weapon used in the crime seized. Three other people were with Amarpal when he attacked the girl.
Security has been tightened in the area.