Demi was in such dire condition when she OD'd her assistant thought she was dead, and one of her bodyguards may have saved her life.
Sources say the bodyguard somehow knew there was an emergency at Demi's home a week ago Tuesday morning, and when he entered the home Demi's assistant was screaming, "She's dead, she's dead!"
We're told the bodyguard rushed to Demi's side and it appeared she was not breathing. Our sources say there was blood on her pillow ... an ominous sign, because it's evidence of hemorrhaging. It appears there was also vomit and her airways may have been clogged.
Sources also say the bodyguard administered some sort of first aid to keep Demi alive before paramedics arrived. Based on what we're told it appears the bodyguard propped Demi up and tried clearing her airway which allowed her to breathe.