updated 07/25/2011 AT 10:20 AM ET
•originally published 07/25/2011 AT 8:15 AM ET
The five-time Grammy winner last spoke to her security team at 10 a.m. Saturday, telling them she was going to sleep. Rigor mortis had set in by the time she was found, suggesting she had been dead for several hours.
Sources tell Britain’s Sun newspaper that Winehouse, 27, had seen a doctor Friday night as part of a routine series of regular checkups, given her battle with addiction. The doctor saw nothing amiss.