Kaifi Ali Rizvi gave shelter to the two accused and even ensured treatment of one of them who had been injured.
A total of six persons have been arrested so far in the murder which took placed in Naka area of Lucknow on October 18.
Sadiq was sent home on Tuesday after being questioned by officers of the Internal Security Division (ISD) of Karnataka police in Hubballi.
The chief minister has said that the trial of Kamlesh Tiwari's assailants should be done in fast track courts and charges should also be framed against those involved in the conspiracy of the murder.
The accused Sayyed Asim Ali had also uploaded a video on YouTube, speaking against Kamlesh Tiwari.
The Uttar Pradesh police also carried out searches at a few 'madrasas' at Shahjahanpur at night but nothing came out of it.
The Uttar Pradesh police had said five persons, including three from Surat, were held in connection with the killing.
Hindu Samaj Party leader Kamlesh Tiwari's mother Kusuma has accused a local BJP leader of killing her son over a land dispute.