Union minister Ajay Mishra's son Ashish Mishra - charged with murder in Lakhimpur Kheri - has not been arrested 24 hours after the First Information Report naming him was filed. A top police officer of Uttar Pradesh explained the inaction today, saying they were "busy". "We were first busy with negotiations with farmers and then with postmortems and then with getting the cremations done. We follow a due process in every case and we will investigate this case thoroughly," SN Sabat, the Additional Director General of Police for the Lucknow Zone, told NDTV.