Michael Jackson's blood contained a lethal level of propofol -- a powerful anesthetic normally excluded for use in hospitals -- when he was found unresponsive in his home on June 25, according to a search warrant released Monday.

The document unsealed Monday allowed officials to raid the Houston offices and storage facility of Dr. Conrad Murray last month. Murray is facing manslaughter charges in Jackson's death.

The warrant also says Murray told a Los Angeles police officer he administered several drugs to Jackson the day he died, including 25 milligrams of the sedative, which he gave intravenously, but that he never ordered, purchased or received any of the propofol. Instead, Murray claims he found about eight bottles of it in Jackson's home along with numerous other vials and pills.

Murray will be arrested within two weeks -- and possibly as soon as next Wednesday -- according to a FOXnews.com report, which cites an anonymous law enforcement source.

Investigators will likely execute another search warrant -- possibly at a Los Angeles pharmacy -- the report says, as they try to build a case that Murray's treatments led to the pop star's death in June.

Murray reportedly gave the entertainer the powerful anesthetic propofol to help him sleep hours before his death.