Image: FILE PHOTO - Whitney Houston Dies, Aged 48
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TODAY   |  February 16, 2012

Subpoenas for Houston’s doctors, pharmacists

Subpoenas have been issued to Whitney Houston’s doctors and pharmacists as officials try to figure out what killed the pop star. NBC’s Kristen Dahlgren reports.

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>>> to more on the death of whitney houston . subpoenas have been issued to doctors and pharmacists as officials try to figure out what killed the singer. nbc 's kristen dahlgren is in los angeles with details. kristen , good morning to you.

>> good morning, savannah. at this point, this is not classified as a criminal investigation . but this morning, there is no new focus on those pills found in whitney houston 's room.

>> newly published photos show whitney houston lounging pool-side at the beverly hilton. and days later, she was dead. on her death certificate , the cause of death is listed as deferred. toxicology results could take weeks to come back. the coroner said they didn't find an unusual amount of prescription pills in her hotel room . but subpoenas have gone out to doctors and pharmacists for houston 's medical and prescription records. the coroner calls that routine. experts say investigators are looking to see if houston was taking pills as prescribed.

>> you have a pill vial, for instance, that has sickened like 60 tablets that were there, three days ago. and there's two left. that would give me a good indicator that there may be something amiss or out of place.

>> defense attorney ellen garrafolo has been involved in cases where a doctor was charged in a patient's death because of drugs prescribed.

>> what we've seen in the anna nicole smith case and the michael jackson case , there could be information discovered that leads prosecutors or the coroner to conclude that there was conduct that is illegal in the provision or prescribing of prescription medication .

>> beverly hills police say so far, there is no obvious sign of criminal intent . even though the website tmz is reporting that officials say houston was not doctor-shopping or using aliases to get medication. in houston 's home state of new jersey , governor chris christie is defending his position to fly flags at half-staff on saturday.

>> her accomplishments in her life were a source of great pride for many in this state.

>> christie's office said they've received complaints from many in the state who doesn't thing she deserves the honor. many who gathered at a memorial agreed she deserves the recognition. but fans will not be part of the star's invitation-only funeral saturday. a small church where whitney houston got her start in the choir, only her closest friends and family will now say good-bye. now, at that funeral, aretha franklin will sing, whitney's mentor, clive davis is expected to speak. there's been some speculation that houston 's ex-husband, bobby brown has been shut out of the funeral. a publicist tells nbc news that the rumors are false. and in a statement they say brown's daughter, bobbi kristina who was treated for stress, is doing much better.

>> kristen dahlgren, thank you.

>>> just ahead, roommates of the university of virginia lacrosse player accused of killing his girlfriend, testify in his murder trial. and describe george huguely's strange behavior that night. this is "today" on nbc .

>>> coming up, an exclusive inside