Kolkata: Suparatim Das, husband of Shampa Das, a civic volunteer who was found dead inside their house at Kaikhali on Friday evening, has been arrested by Bidhannagar police for murdering his wife with two hired criminals.His mother has also been arrested for her alleged involvement in the incident. They have been remanded to four-day police custody after being produced at a Barrackpore court on Monday. Police have also detained a domestic help after a prolonged interrogation on Monday. In the face of rigorous grilling, the accused admitted his involvement and narrated the incident. To evade getting caught, the husband hatched a plan of himself being tied up with a rope against a chair. Also Read – Heavy rain hits traffic, flightsAmit P Javalgi, DC, DD, Bidhannar police said they suspected her husband’s involvement after interrogating him as there were irregularities in his statements. During interrogation, Das told police that his wife used to torture and pressurize them for the property. Das’s mother is the owner of the property and the house at Kaikhali, where the couple lived with their 3-year-old son.Police said Das hired two criminals with the help of one Roshid Ali Mollah with whom Das had met a few months ago. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedIt is through Mollah that Das had struck a deal with the two criminals. Though Mollah is not a physiotherapist, he used to give massage to Das. After the investigation, police came to know that Das had hired the criminals by paying them around Rs 60,000. Das and his mother helped criminals enter the house after the victim woman arrived from her duty on Friday evening. The victim’s mother-in-law stepped out of the house with her grandson a few minutes before the incident.The hired criminals went into the room, tied up the husband with a rope against a chair and hit the woman with a sharp weapon. Das told police that he hatched the plot of killing his wife after failing to bear her torture on him and his mother. The victim used to beat them up, demanding to name the entire property against her name. Das and an attendant, who used to look after domestic works, were interrogated together.