The Rajasthan government shifted Mathur, a 1995-batch IPS officer, to APO on Saturday for administrative reasons.
The ACB is probing allegations that Agrawal misused his office to extend undue benefits to a private company, from which his family allegedly purchased 40 properties below market rates.
Former chief minister Ashok Gehlot has demanded a CBI and ED probe, saying placing the officers on APO is not sufficient.