As the Michael Jackson death investigation continues, ET has the latest on Dr. Conrad Murray, the doctor who was with Michael on the day he died. A rep for Murray's attorney tells ET that the police have not contacted Murray since June 27, two days after Jackson passed away.

The rep also says that they are not divulging information as to the doctor's whereabouts, and tells the ET newsdesk that the doctor conducted "two" interviews with the LAPD after the singer's death and that he is free to travel anywhere he wanted.

ET special correspondent Diane Dimond, who has been covering Jackson news since 1993, says that the details to this story are constantly changing and that she has been working the phones to get the latest information.

Dimond goes on to say that Dr. Murray has medical practices in both Las Vegas and Houston.

"So where 'exactly' is Dr. Murray? The doctor hasn't spoken to police since two days after Jackson died and they never issued a subpoena for his records," Diane says. "In all my years working with law enforcement, that indicates to me that the LAPD doesn't need any more information from Murray. It's clear they are starting to weave the web of what killed Michael Jackson, and they just may be trying to determine "if" Dr. Murray can be connected."

It will be a couple more weeks until the Los Angeles Coroners Office releases the official autopsy toxicology reports, and Diane says that there could be scientific reasons for this delay.

"Sources tell me that certain pathology tests can not be conducted on a person's brain until three weeks after death, because the brain tissue has to be treated in a certain time consuming way," she says. "It can often take four to six weeks to complete the study, and in the Jackson case, they're certainly not going to rush to a conclusion."

As for reports that the investigation could become a criminal case, Sandi Gibbons, a spokesperson for the Los Angeles District Attorney's Office, would only say that they are following normal procedure.

Keep checking back for all the latest into the Michael Jackson death investigation, and watch ET tonight for more of Diane Dimond's interview.