The 911 call made from Demi Lovato's house after her suspected overdose has been released. In the audio, we hear Lovato's assistant talking with an emergency dispatcher. At one point we hear the dispatcher assure the assistant that medical crews are on their way and they should be hearing sirens shortly - to which Lovato's assistant replies, "Wait, no sirens, please." The dispatcher then explained that this was an emergency situation and he had no control over the sirens. It's assumed that the assistant didn't want to attract attention to the scene with sirens, but when someone's life is on the line, that won't fly with emergency responders.