Dr. Conrad Murray

The strange circumstances surrounding the death of Michael Jackson have law enforcement personnel working overtime to figure out exactly what happened.

It seems that the longer the investigation into just how the superstar passed away continues, the more disturbing and perplexing some of the details become.

One of the theories investigators are exploring, according to TMZ, is that the singer's personal physician, Dr. Conrad Murray administered Propofol to him.

After giving Jackson the hospital-grade anesthesia, the mere possession of which is probably enough for him to face criminal charges, Murray left the room.

When he returned, he discovered Michael Jackson's dead body.

We emphasize that this is only a theory. However, it would explain the timeline gap between when Murray says he found MJ and when a 911 call was made.

The iconic Michael Jackson (1958-2009).

Sources say when paramedics arrived Michael Jackson was already dead - even though Murray would not let them pronounce him as such on the scene - and found with an IV in his arm, an IV stand nearby along with an empty IV bag and oxygen tank.

The paramedics on the scene say Dr. Conrad Murray's conduct was "strange" - he was "hard to deal with" and was "getting in the way" of emergency responders.

The paramedics wanted to pronounce Michael Jackson dead at the house but Dr. Murray, who has higher authority, insisted they transport the singer to a hospital.

At the UCLA Medical Center, doctors gave up on resuscitation efforts because Jackson was clearly dead, but Dr. Murray - now the target of a manslaughter investigation - continued CPR, which some of the doctors found odd, to say the least.

As always, more details as the story develops ...

When paramedics arrived at Michael Jackson's house, he was already dead and it took them a while to even realize the victim was the music icon, new reports say.

Jackson was flatlined when the paramedics arrived shortly after noon PST on June 25. There was no electrical activity in Michael's heart and no sign of life.

Paramedics wanted to pronounce him dead at the scene but Dr. Conrad Murray, Jackson's personal physician, insisted the singer be transported to the hospital.

As a higher medical authority than the EMTs, Dr. Conrad Murray had the power to overrule them. So it went and EMT personnel could not "call it" at his home.

Paramedics didn't realize for nearly 10 minutes the victim was Michael Jackson. As one emergency worker put it: "It just looked like a frail, old, sickly man."

Meanwhile, law enforcement sources continuing to investigate Conrad Murray say he kept a stash of drugs - including the powerful anesthesia Propofol, which they think stopped Michael Jackson's heart - hidden in his closet.

Sources say when the LAPD first searched Jackson's home the night he died, they did not turn up Propofol or many of the other drugs that were in his house.

Dr. Murray talked to the LAPD the following Saturday and the incriminating statements he supplied triggered another, broader search warrant, police are saying.

Cops returned to the house the next Monday and found "various drugs" clandestinely stashed in a closet of the guest room where Dr. Conrad Murray stayed.

Dr. Murray himself apparently told detectives about the closet when interviewed, triggering the search and ultimately a manslaughter investigation against him.

A law enforcement source tells TMZ that "The drugs were concealed... they weren't obvious." Among the stash - Propofol, the drug they believe killed Jackson.

Dr. Conrad Murray is the target of a manslaughter investigation.

In an incredible twist just one month after Michael Jackson's death on June 25, police arrived armed with a search warrant authorizing seizure of documents at a storage locker in Houston belonging to the star's personal physician.

Law enforcement is hunting for "items constituting evidence of the offense of manslaughter that show Dr. Conrad Murray committed said criminal offense."

Bizarre findings in the investigation into Jackson's death have shed new light on the timeline of his passing and Conrad Murray's odd actions around that time.

Authorities believe Jackson died from an overdose of the powerful anesthesia Propofol, and that Murray may have administered it (he has not been charged).

Dr. Murray called 911 at 12:21 p.m. PST, and says he found Jackson in distress a half hour earlier. But Dr. Murray's employees made a trip to a Houston storage facility at 9:22 a.m. PST, raising all sorts of questions about what happened.

The storage facility manager says two women picked up 3-5 boxes and became nervous when the manager began questioning them about why they were there.

Also, authorities are keenly interested in talking to a woman named Stacey Howe who is in some way connected to Dr. Conrad Murray's medical practice.

During this week's Houston DEA raid of his office, federal agents seized two "Yahoo emails from Stacey Howie (sic)." In the raid of Dr. Murray's storage unit, the agents seized "correspondence addressed to Stacey Howe."

Howe is connected to Dr. Conrad Murray's Las Vegas medical practice.

Several items seized at Murray's Houston office where related to "Pamphlets on Sleep Center." The Sleep Center is located near Doctor's Hospital in Houston.

Dr. Murray was suspended from Doctor's Hospital - allegedly for not completing medical records in a timely fashion. All of these revelations, plus incriminating statements Murray himself made, make criminal charges likely.

All in all, it's not looking good.

The Houston office of Dr. Conrad Murray is being raided by authorities who are looking specifically for all medical records relating to Michael Jackson.

Murray was Jackson's personal physician at the time of his June 25 death. He is the focal point of police and coroner investigations into Michael's demise.

Eight DEA vehicles arrived at his offices around noon CST. LAPD detectives also arrived on the scene along with uniformed members of the Houston PD.

Reports say there are at least 10 members of the DEA's Tactical Diversion Team and another dozen or so DEA agents on hand as well. Serious stuff.

A search warrant authorized law enforcement to search for and seize items, including documents, they believe constitutes evidence of manslaughter.

Armed with a search warrant, law enforcement agents entered the Houston property and began going through medical records belonging to Conrad Murray.

The doctor may be looking at criminal charges for administering Propofol to Michael Jackson - with some sources saying it is more a matter of when than if.

Propofol is a hospital-grade anesthetic that should never be found outside a hospital, yet was found in Michael Jackson's home and body after the star died.

He obviously never intended to kill Michael Jackson, so murder is off the table - but manslaughter charges seem very realistic considering what happened.

For now, he is not charged with anything. Murray's lawyer, Edward Chernoff, issued the following statement regarding the investigation of medical records:

"The coroner wants to clear up the cause of death; we share that goal. Based on Dr. Murray's minute-by-minute and item-by-item description of Michael Jackson's last days, he should not be a target of any criminal charges."

As it waits for the findings of several outside consultants, the L.A. County Coroner's office needs another two weeks to release a full Michael Jackson autopsy report.

Some tests are already in and reliable sources say Propofol will ultimately be listed as the primary cause of death. But the Coroner does not release partial results.

Meanwhile, the center of the investigation, Dr. Conrad Murray, has made himself scarce since speaking with the LAPD two days after Michael Jackson's death.

The doctor, who was serving as Michael Jackson's personal physician at the time of the music superstar's death, has left California, at least for the time being.

Dr. Conrad Murray is reportedly back in Houston, Tex., where he practices medicine. As for him being implicated in Jackson's death, it looks like when, not if.

Murder may be a stretch, but Life & Style may not have been as far off as we thought with the above cover. Criminal charges may be filed against his personal doctor.

LAPD detectives continue what has become an exhaustive investigation. They are leaving no stone unturned and are already treating the case like a homicide.

It's looking more and more like the anesthesia Propofol, which no one should ever be given outside a hospital was the cause of Jackson's death June 25.

It is also looking more and more like Murray is the man who administered Propofol.

We emphasize that he has not been charged with a crime. This is just what we are hearing. As always, we will post more details as they become available.

The man at the center of the investigation into Michael Jackson's death, Dr. Conrad Murray, is in the LAPD's crosshairs thanks to his own comments.

According to TMZ, which cites law enforcement sources, Dr. Conrad Murray's statements to police on the Saturday following Jackson's June 25 death of cardiac arrest contained several incriminating disclosures about his involvement.

Some members of law enforcement are surprised Jackson's personal physician spoke in the first place and equally surprised about what he volunteered.

The LAPD is already treating Jackson's death as a homicide and there have been multiple conversations between its detectives and the L.A. County District Attorney's office, although the D.A. has not opened its own formal investigation.

As more facts become known, the wide-ranging LAPD and DEA investigation into what killed Michael Jackson (1958-2009) is centering on his personal physician.

While some of the toxicology results are not in yet, important test results already completed point to the anesthesia Propofol as the primary cause of death.

Law enforcement sources say the evidence is clear - the use of the hospital-grade anesthesia was the primary reason Michael Jackson's heart stopped beating.

So far, Dr. Murray's lawyer has neither confirmed nor denied on the record if his client administered Propofol to Jackson the day he died. We'll keep you posted.

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.

The central target in the investigation into Michael Jackson's death is Dr. Conrad Murray, who was at Jackson's house when the singer went into cardiac arrest.

According to TMZ, the doctor is not cooperating with authorities, but they have still uncovered evidence linking him to the drug that may have killed Jackson.

As a result of Dr. Murray's second interview with police, the LAPD obtained a warrant to conduct a second search of Michael's home, and they found Propofol.

This powerful anesthesia should never be found or used outside a hospital. There is evidence Propofol was given to Jackson before his heart stopped beating.

There is also evidence Dr. Conrad Murray may have administered it.

Murray's lawyer, Ed Chernoff, would neither confirm nor deny if Dr. Murray administered Propofol to Jackson. Law enforcement sources tell TMZ if they conclude the doctor administered the drug, it may lead to manslaughter charges.

Investigators are also suspicious of the delay between Jackson succumbing to cardiac arrest and the ensuing 911 call, during which he was already unconscious. Murray says he waited 20-30 minutes because he didn't know the music icon's address.

Not only was Murray serving as Jackson's personal physician, but MJ lived on one of the most famous streets in the world - one house above Sunset Boulevard.

The investigation into Jackson's death has also fueled an investigation into his history with drug use and the doctors who may have enabled his habits.

Law enforcement is seriously investigating the prescription practices of several doctors who gave Michael Jackson access to various medications.

Investigators are particularly interested in doctors who used aliases to write prescriptions for Jackson. One of the central figures: Dr. Arnold Klein.

Jackson's staff complained that Klein was using the names of employees and others to help the star score drugs. More details as this story develops ...

A doctor who treated the late Michael Jackson claimed that the singer self-injected Demerol into his system, according to the file from his 2005 molestation trial.

In the Santa Barbara County Sheriff's notes, a member of Jackson's security detail - a retired L.A. County Sheriff's deputy named Michael Laperruque - said at least several doctors were trying to get Michael Jackson off of Demerol at the time.

One of the doctors "was upset with Jackson because he had been self-injecting."

A Demerol overdose has been suggested as a possible cause of death for the music icon, who passed away suddenly on June 25 after suffering cardiac arrest.

Laperruque told detectives he had picked up Jackson's prescriptions for the star, usually under the name Chris Carter. Carter was one of Jackson's bodyguards.

Also, Laperruque said that one time when he was at Neverland Ranch, his job was to keep Jackson's family out because they were planning an intervention.

Michael Jackson, center, with Drs. Arnold Klein, left, and Conrad Murray.

Meanwhile, sources say that a pair of doctors at the center of the inquiry into Jackson's death - Dr. Arnold Klein and Dr. Conrad Murray - have not turned over the medical records the L.A. County Coroner's office has requested.

According to TMZ, both doctors have turned over some records, but the coroner's office has not gotten complete Jackson medical records from either doctor.

And there's this:

A driver for Michael Jackson told the coroner's officials shortly after Jackson's death that the singer was going to see Dr. Arnold Klein multiple times a week in the months preceding his death and sometimes would spend 3-4 hours inside.

Dr. Conrad Murray, the doctor who was at Michael Jackson's home the day he died did not give Jackson OxyContin or Demerol that day, according to his attorney.

His lawyer, Edward Chernoff, wouldn't make the same statement about the powerful anesthesia, Propofol, that was found at the late star's home, however.

Law enforcement sources say the information Dr. Murray gave police regarding drugs at Jackson's home was enough for cops to secure a warrant from a judge.

This alone is a significant development, as a search warrant can only be issued if there is probable cause to believe a crime has been committed.

The facts: When police searched the home, they found Propofol. It was specifically labeled Propofol. There was no indication it had been prescribed to anyone.

Chernoff reiterated earlier claims that his client did not give Demerol or OxyContin to Jackson the day he died. But he would not take the same stand on Propofol.

Chernoff told TMZ when asked for comment on the subject, "I have no statement on whether the doctor prescribed or administered Propofol," adding, "We're confident whatever the doctor prescribed did not kill Michael Jackson."

Police obtained a search warrant the day after Michael Jackson died. Another warrant was issued two days after Dr. Conrad Murray's interview with LAPD investigators, and that's the one that led cops to the Propofol discovery.

A second warrant may have been needed if the first covered prescription medications only. DEA and LAPD officials are trying to determine how the Propofol - a drug that should never be administered outside a hospital - ended up in MJ's home.

Jackson's medical records and billing info may be the key to unraveling the mystery of who prescribed what to him and when - and holding the doctors responsible.