"Never imagined I'd find myself responsible for mom's IG account, but here we are," wrote Homer Laffoon, the eldest son of the late actor.
The Los Angeles medical examiner found that drugs in the actor's blood were inactive at the time of the crash that killed her.
The ruling came after a legal battle between Laffoon and his mother's ex-boyfriend James Tupper.
Lynne Mishele says the fiery wreck left her "completely traumatized" and "without a place to live.”
Heche's son Homer Laffoon filed paperwork in September to assume control over her estate. He's been fighting his mother's ex-boyfriend ever since.
The book’s publisher said that Heche turned in a manuscript shortly before she died.
The actor's son said he and his brother "are convinced our Mom would love the site we have chosen for her."
“I’ve already thought about it,” Heche had said in a newly released podcast interview.
James Tupper applauded his "Men in Trees" co-star Emily Bergl for pushing back on claims that Heche was "crazy."
"This entire situation is tragic and there really are just no words. I’m sending love to everybody involved.”