Doubts about purported Michael Jackson 911 tape

A recording purported to be a call from the ambulance rushing Michael Jackson to a hospital the day he died was not "typical" of paramedic procedure, according to a Los Angeles Fire Department official.A British tabloid posted the recording online, suggesting it was evidence that Jackson had no pulse at that time -- contrary to what his personal doctor said.Dr. Conrad Murray has been charged with involuntary manslaughter in Jackson's June 25 death, which the coroner ruled resulted from a combination of drugs given to him that morning.The Sun newspaper did not reveal the source of the recording, but characterized it as a "911 tape."Brian Humphrey, a spokesman for the Los Angeles Fire Department, said he was skeptical about the authenticity of the audio, adding that it "did not come from our agency."A male -- who says he is a paramedic in an ambulance -- is heard speaking to a female, who supposedly is at the UCLA Medical Center emergency room."We have a male, 50. Pop star Michael Jackson. Unresponsive, no pulse. Tried to resuscitate him. Unsuccessful. We are en route," the male voice said."OK. We'll have doctors standing by," the female voice replied."We've done everything we can here in the ambulance. Hopefully, when we get there -- we should be there in five minutes," the male said. "It doesn't look good."Humphrey said it is routine for paramedics to use a cell phone or a two-way radio to talk to an emergency room as they rush to a hospital, but they "don't normally speak like this in a medical response."Specifically, the paramedic would not be likely to use a patient's name in the conversation, even if it is a celebrity, Humphrey said.It would be routine for the hospital to record the conversations for legal reasons, he said