What is known about Ketan Agarwal's murder case so far?

Ketan Agarwal, the 26-year-old son of businessman Vishal Agarwal, was allegedly pushed off the Lohagad Fort near Pune by his fiancée Siya Goyal and her lover, Chetan Chaudhary. Siya initially told police Ketan fell while clicking pictures. Siya allegedly sabotaged a pre-wedding trip to Bali by hiding Ketan's passport. She put up pictures mourning him after his demise.