The statement also revealed toxicology tests had been performed and while results were not known at the time, there were no narcotics found at her home where she died.
Erin Moran - best know for playing Joanie Cunningham in American sitcom Happy Days - has passed away, aged 56. God has you now, Erin... She also starred in the spin-off, Joanie Loves Chachi from 1982 to 1983, which followed her character's romance with Chachi, played by Baio.
Scott Baio, who played Chachi to Moran's Joanie, remembered the actress' "contagious smile" and "warm heart" on Twitter Sunday. I always hoped she could find peace in her life.
A sheriff's department spokeswoman told AFP it was unclear when the autopsy would take place but cautioned it would likely take some time because her death occurred in a small town.
Moran was born in Burbank, California and signed with her first agent (or, rather, her mother did) when she was five years old.
The actress was found dead Saturday in her home in New Salisbury, Indiana, about 20 miles northwest of Louisville, Kentucky, after paramedics responded to a 911 call.
In her final years, Moran had battled financial problems and depression. She most recently appeared on VH1's reality show "Celebrity Fit Club" in 2008 and the low-budget film "Not Another B Movie" in 2010. "Rest In It serenely now. too soon", he wrote.
Moran was found Saturday by police in IN after someone called in about an unresponsive female.
Police say there were no "illegal narcotics found" in her in home.
According to the outlet, she had a memoir in the works titled Happy Days, Depressing Nights.
Moran, Ross and two other "Happy Days" actors sued CBS in 2011, claiming they were owed money for merchandising related to the show.