44-year-old Shyam Inchal, a resident of Saki Naka, Andheri East, was convicted by a sessions court on Tuesday for murdering his wife Seema Inchal (30) and a colleague, Rajendra Rane (40), who attempted to save her, during the act. 30-year-old Mitesh Ghonge, another colleague, who Shyam suspected of having an illicit affair with his wife, is a key witness in the case and survived with minor injuries.