is reliable. we have a copy of the preliminary death certificate. immediate cause of death is deferred. deferred because drug skeening tests will not be finished for several weeks. we are going to be joined by the reverend who is giving the eulogy and married whitney houston to bobby brown. we have the dangers of mixing boos and pills. something that goes far beyond what may have happened to whitney houston. it was eye-opening for me. we did it before the show began. here is what investigators are looking into now. precipitation pills found inside her beverly hills hotel room are the focus of investigation. authorities tell cnn they issued subpoenas to her doctors in los angeles and on the east coast seeking her medical records and are looking into what type of precipitations she was given. investigators are contacting various pharmacies where her prescriptions were filled including this one raided by the drug enforcement agency in 2009 after michael jackson died from an over