Defence expert admits Jackson doctor made mistakes

Prosecutors on Monday forced an expert defence witness to admit that Michael Jackson's doctor made significant errors when he gave the singer the potent anesthetic propofol for sleep.

Under aggressive cross-examination. Dr. Paul White also acknowledged that he had never heard of propofol being administered in a bedroom -- as happened in Jackson's case.

White is expected to be the last defense witness in the involuntary manslaughter trial of Dr. Conrad Murray. The propofol expert theorized last week that the 50-year-old singer likely injected himself with a fatal dose of the drug without Murray's knowledge, causing his own death on June 25, 2009.

Propofol, normally used to sedate patients for surgery, was ruled to be the chief cause of Jackson's death.

Murray told police that he gave 25 milligrams of the drug to Jackson at the singer's Los Angeles mansion.

"Have you ever administered propofol in someone's bedroom?" prosecutor David Walgren asked White.

"No I have not," White said.

"Have you ever heard of someone doing this prior to this case?" Walgren asked.

"No," White said.

White also admitted that Murray deviated from commonly accepted medical standards on the day Jackson died and over the roughly two months earlier, when Murray was giving the singer daily doses of propofol for sleep.

For instance, White said that when he administers propofol he has a heart monitor and a blood pressure cuff at the patient's bedside.

Prior testimony has indicated that Murray did not use those pieces of equipment on the day Jackson died.

Walgren asked White if Murray had violated the physicians' oath to "do no harm" in giving Jackson propofol.

"I think he was providing a service to Mr. Jackson that he had requested and in fact insisted on," White said.

Murray told police that he monitored Jackson for an unspecified amount of time after giving the singer propofol, which can stop a person from breathing.