Here is the terrible thing. Random somehow became King of Amber on the bluff above the Abyss (which is the name we give to the bottomless chasm that encircles the Courts). They say the Unicorn herself chose him, for whatever reason.
Flora
Random lies in honored state up the slope of Kolvir, in a vault I built with my own hands. He faces the sky he aimed for.
Gerard, after Random's death
Random was a very good man, even though few recognized it at the time.
Vialle
All the others immediately pledged their allegiance - as I'd have done! - but, you may not know this, Random always despised me.
Flora to Orinda
More likely, if the Shadows reflect the truth, well, then he died in the bath, without the Jewel, beaten and drowned and thrown off the cliffs where Gerard threatened to once throw my father to cover the regicide. It would explain the thinly fabricated lie. There are still questions, but several things point toward that conclusion.
Archer, theorizing to Martin's partisans
I've been in denial about it for a decade, but he's gone, he's dead; please don't drag his corpse from the grave, this is hard enough as it is ...
Orinda to Riley
My own father's strategy was to ensure my safety by hiding me in plain sight. Pretend I was of no import to him, further, to make himself small in the family's regard.
Martin
Among my aunts and uncles, Your Majesty's father was the only one who ever showed me real kindness. I loved him well, and I will not let his murderer walk away unpunished, kinsman or no.
Orinda to Martin
If I'd known that Random was to be King, I might have done things differently.
Orinda
I didn't want to be a tattle-tale, I guess. 'Random, your wife is sleeping with your brother!' Not my place to tell him.
Orinda
After a few years, will they care that Random's gone?
It's already been ten years, Arrow. Those who still care won't care any less because we've spent a few more weeks getting ready.
Arrow and Orinda
But my father was the Unicorn's Chosen, and she acted bring together his avengers.
Martin
Ewan McGregor is Random