LAPD Treating Michael Jackson Death as a Homicide, Ramping Up Investigation of Dr. Conrad Murray

Was Michael Jackson murdered?

La Toya Jackson's inflammatory statement from earlier in the week may not be all that far-fetched. Multiple law enforcement sources say the LAPD is already treating the superstar's death as a homicide, and are focusing on Dr. Conrad Murray.

The evidence points to the anesthesia Propofol as the primary cause of his death. As TMZ reported, vials of Propofol were found in Michael Jackson's home.

Law enforcement sources say there is already "plenty of powerful evidence" linking Dr. Conrad Murray as the person who administered the drug to Jackson.

That evidence includes items found in Jackson's house, including Propofol, an IV stand and oxygen tank. Murray was Michael Jackson's personal physician.

The LAPD has had "multiple conversations" with the L.A. County District Attorney's office, even though the case has not been formally presented to the D.A.

Dr. Murray's lawyer, Ed Chernoff, has neither confirmed nor denied if his client gave Propofol to Jackson. Dr. Conrad Murray has not been charged with a crime.

Several pharmaceutical companies have been contacted by the DEA in the case as authorities close in on how the Propofol got into the body of the late singer.

The vials of Propofol found in Jackson's home all have lot numbers. The DEA contacted Teva Pharmaceuticals - which manufactured one of the vials found there.

Teva sells Propofol to medical distributors, who then turn around and sell the vials to hospitals and doctors. The DEA hopes a trail will lead to some answers.

Dr. Arnold Klein, a friend of the singer who treated him over the years, is also under investigation. It is not believed he ever administered Propofol, but the L.A. Coroner's Office has subpoenaed Jackson's medical records from Klein.