Los Angeles, July 23 (DPA):  Police and federal agents Wednesday raided the Houston offices of Conrad Murray, the personal physician who was with Michael Jackson when the entertainer died suddenly of cardiac arrest last month.

Though the results of a coroner's report are yet to be released, attention is focused on the hospital anesthetic Propofol, a strictly controlled drug usually administered intravenously which can easily cause cardiac arrest if not properly administered.

News reports said that up to a dozen agents of the Drug Enforcement Agency entered the Murray's medical office, armed with a search warrant, looking for medical records.

In a statement released Tuesday, Ed Chernoff, the lawyer representing Murray, said that Jackson's personal physician did not prescribe any drugs that may have caused the singer's death but that the investigators were seeking Jackson's medical records.

"The coroner wants to clear up the cause of death, we share that goal," he said. "We don't have access to the most important information in this case, the toxicology report. We're still in the dark like everybody else."

Chernoff said that Murray's minute-by-minute and item-by-item description of Michael Jackson's last days should not make him a target of criminal charges.

"Dr. Murray was the last doctor standing when Michael Jackson died and it seems all the fury is directed toward him," Chernoff said.

Attention focused on Murray in the immediate aftermath of Jackson's death when he dropped out of sight just as Jackson's family and investigators were seeking more information on his last hours. Police have questioned Murray twice since Jackson's death and seized his auto from the rented mansion where Jackson died, but have clarified that he is not a suspect.