Los Angeles  - Police and federal agents on Wednesday raided the Houston offices of Michael Jackson's personal doctor Conrad Murray, in a search for medical records they believed would constitute evidence of manslaughter, the doctor's lawyer said.

Murray was the personal physician who was with Michael Jackson when the entertainer died suddenly of cardiac arrest last month at age 50. Attention focused on the doctor 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.

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.

"The search warrant authorized law enforcement to search for and seize items, including documents, they believed constituted evidence of the offense of manslaughter," Ed Chernoff, Murray's attorney, said in a statement posted on his law firm's Web site.

In an earlier statement Chernoff said that Murray 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 detailed 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.

Police questioned Murray twice since Jackson's death and seized his auto from the rented mansion where Jackson died, but clarified that he is not a suspect. (dpa)