Central Excise department employee Abhijit Sinha, who was picked up along with professor Kaushik Ganguly for alleged Naxalite links last week and let off after questioning, killed himself on Sunday. The mangled body of 32-year-old Sinha, who threw himself in front of a running train near Dum Dum, was found in the evening.Sinha’s family members have alleged that he was driven to suicide by the ‘‘humiliating’’ police questioning. Police had arrested Sinha and Ganguly, a chemistry professor at Rajabazar Science College, for their alleged links with the People’s War Group in Midnapore. West Bengal Chief Minister Buddhadeb Bhattacharya said the police drew a blank with Sinha, but have established some links between Ganguly and the group.‘‘Abhijit couldn’t bear the insult and chose to end his life,’’ alleged Rama Sinha, his mother. Sinha’s wife Manoshi said her husband had been behaving ‘‘abnormally’’ after he returned to their Chatterjee Bagan flat on Saturday. ‘‘He looked devastated. He jumped whenever the telephone rang,’’ she claimed. ‘‘On Sunday morning, Abhijit left the house and never returned.’’ The Railway police later came calling, with news of the suicide. The suicide, at any rate, is bad press in a Left Front governed state. ‘‘We cannot support police torture in the name of interrogation,’’ Biman Basu, Left Front Chairman and CPI(M)’s Politburo member, told The Indian Express. ‘‘The Government must inquire into what exactly happened.’’While the government claims to have found evidence to implicate professor Ganguly, his mother Amita today lodged a complaint with the chairman of the West Bengal Human Rights Commission, alleging that her son was being tortured during interrogation. Ganguly had earlier complained before the Sub-Divisional Judicial Magistrate about police torture when he was produced in court. The judge had asked the police to file a medical report within two days. The Inspector General (Law and Order) West Bengal, Chayan Kumar Mukherjee, said, ‘‘All I have heard is that there’ll be an inquiry. I’m not in a position to elaborate.’’ Chairman of the rights commission, Justice Mukul Gopal Mukherjee, said he had ordered an ‘‘independent inquiry’’ into the complaints. ‘‘We have asked for a report from the SP of West Midnapore,’’ he said.