Farook was a member of Dravidar Viduthalai Kazhagam (DVK), and administered a WhatsApp group comprising 400 muslim members from different regions in Tamil Nadu.
Last Thursday night, H Farooq (31), a rationalist and a member of Dravidar Viduthalai Kazhagam, was stabbed and hacked to death near Ukkadam in the city.
Police said Farook was an atheist and his anti-Muslim sentiments had angered some people. Police officials said they would seek their custody. Numerous members are Muslims. On Sunday, The Indian Express reported that one of the reasons that could have led to Farook's murder was a photo the rationalist had posted in the WhatsApp group 15 days ago, in which one of his children was seen holding a placard with the handwritten slogan "Kadavul illai, Kadavul illai, Kadavul illai (No God, No God, No God)".
According to police, the attackers had warned him on phone and in person to "stay away from anti-religious activities".
"He [H Farook] ignored them and went ahead strongly".
"More than his rational arguments, they felt that taking such public positions using children was a threat to Islam", the report quoted an officer. With them, a total of three people have surrendered in connection with the case. "But Farook's popularity in social media and Muslim followers in his WhatsApp group disturbed them", he said. Hussain is a relative of Kisan Bukhari, the key accused in a bomb blast case in Bengaluru. "So far, there is no evidence to prove a direct link of the blast accused in this murder", the officer added. He works in a mechanic's shop and repairs flat tyres.