Questioning of the 25-year-old software engineer, who has been arrested on charges of killing three members of her family in Bengaluru, has revealed a history of familial tensions over her relationship with her boyfriend —co-accused in the case — and other lifestyle choices, police officers aware of the matter said on Wednesday.Familial, financial tensions spurred triple murder: PoliceThe accused, Shwetha, was taken into custody near Puducherry railway station on Tuesday, while Kenneth, her partner, remains absconding. Police alleged that the pair carried out the murders inside the family’s apartment at Sai Green Homes in Dominic Layout, Seegehalli, on Monday night before fleeing.“We are collecting all evidence and verifying every aspect before drawing final conclusions,” said KR Puram police inspector N Sathish.“Preliminary investigation suggests there were repeated disagreements between the accused and her parents regarding her personal life and relationship. The motive behind the murder is mother Muthulakshmi always strongly opposing her relationship with her boyfriend Kenneth. She also abused Shwetha for availing a huge sum in loans from various banks,” added Sathish.Police said both accused are engineering graduates employed by private firms and were living together in a rented apartment for the past two months. Investigators were also examining if the accused’s accumulated liabilities, including loans amounting to nearly ₹30 lakh, played a role in the murder.During a search of the apartment, police recovered a book which they suspect acted as a purported personal diary to the accused. Investigators said they were analysing the entries and have sent the book for further examination.“Several pieces of evidence have been collected from the scene, including digital records, documents and witness statements. We are reconstructing the sequence of events and identifying the exact role played by each accused,” said Sathish.Earlier on Tuesday, investigators said an argument that began around 7.30 pm at the family’s flat in Seegehalli escalated into violence. “During the discussion, an intense argument erupted over the unpaid loans. In a fit of rage, the couple allegedly attacked Somasundar, Muthulakshmi and Supriya with a machete,” Sathish said.Two victims died inside the flat, while Somasundar managed to step out before collapsing on the staircase. He later died in hospital.