Unsolved mysterious crime within kingship in Nepal "darwar hatyakanda"

The Nepalese royal massacre occurred on 1 June 2001, at a house in the grounds of the Narayanhity Royal Palace, the then residence of the Nepalese monarchy. It is believed that the heir to the throne, Prince Dipendra, killed nine members of his family and himself. The dead included King Birendra of Nepal and Queen Aishwarya. Prince Dipendra became de jure King of Nepal upon his father's death and died in hospital three days after the massacre without recovering from a coma.
But no one jnow about this events what had happen in reality.