Investigators found WhatsApp messages indicating Shalu urged Vishal Gautam to murder her father-in-law. Shalu and Vishal engaged in conversations for months, with Shalu complimenting Vishal and inquiring about his relationship status. Police believe Shalu manipulated Vishal into planning and executing the murder of Vineet Minocha. Vishal erased chat history but failed to remove all WhatsApp call records, which investigators recovered.