A police constable and three others were convicted on Wednesday for killing a 40-year-old man in 2006.
The fast-track court at Sewri sentenced them to life imprisonment.
One of the four persons convicted for criminal conspiracy, common intention and murder of Kisan Narale, 40, was his wife Rukmini Narle 39, said investigating officer D Jadhav who was then posted at Deonar police station where the case was registered.
Narle’s seven-year-old son’s statement played an important part in securing the conviction, added Jadhav.
Kisan’s body was found in Maharashtra compound at the Deonar stretch of the Ghatkopar-Mankhurd Link road in October 2006.
The police had arrested Rukmini, Chembur police constable Ashok Engar (42), Jamal Ahmed (41) and Pandit Sharma for the murder.
Jadhav said: “In the charge sheet we had mentioned that Rukmini was having an affair with Engar. The duo decided to get rid of Kisan, a labourer, and hatched a plan to eliminate him.”
Engar and Rukmini approached the other two convicts Jamal Ahmed and Pandit Sharma who were earlier staying on rent in Narales’ apartment.
Jadhav added, “Sharma and Ahmed owed Rukmini Rs 10,000 that she has loaned them on interest. They were told to assist them in getting rid of Kisan in exchange of the debt amount.”
Engar, Ahmed and Sharma convinced Kisan to have a small party at his residence and made him drink a lot. They took him to the Ghatkopar-Mankhurd link road and smashed his head with a stone and left him lying at the Maharashtra compound.
Jadhav said, “What nailed them was Narale’s son, who they thought was sleeping. Sensing something amiss he not only kept on eye on what was happening in their house, but followed them as they took his father out and saw them smash his head. He testified before the court about the events.”