Dr. Conrad Murray's star defense witness at the Michael Jackson death trial, Dr. Paul White, admitted that lawyers for the embattled cardiologist commissioned a study in which Beagle dogs were given Propofol, RadarOnline.com is reporting.

As RadarOnline.com previously reported, Murray's lawyers were forced to abandon the theory that Michael Jackson had orally ingested the Propofol because test findings found that it was highly unlikely that someone could die from ingesting Propofol.

Under blistering questioning from Deputy District Attorney David Walgren, Dr. White said, "The testing was done on the Beagles last summer. It was a negative study, and the results were never published.”

Dr. Conrad Murray will not be taking the witness stand to testify in his defense in the Michael Jackson death trial, RadarOnline.com is exclusively reporting.

Dr. Murray has been charged with involuntary manslaughter in connection with the King of Pop's death. Testimony will resume Monday with the defense's final witness, Dr. Paul White. Deputy District Attorney David Walgren will be cross examining the propofol expert.

"Dr. Murray has told his lawyers from day one that he wants to testify, and tell his side of events. But lead attorney Ed Chernoff has determined that Dr. Murray will not take the stand because he wouldn't be able to withstand the tough cross examination that the DA would subject him to," a source close to Dr. Murray tells RadarOnline.com.

Dr. Conrad Murray's lead defense attorney, Ed Chernoff revealed in court Friday afternoon, that their defense witness, Dr. Paul White had conducted oral ingestion of Propofol to Beagle dogs, RadarOnline.com is reporting.

As RadarOnline.com exclusively reported, Dr. Murrray's defense team commissioned a study on Beagle dogs to determine how much Propofol would have to be orally ingested to cause Michael Jackson's death.

One of Murray's lawyers revealed in open court last week that findings from the study revealed that taking Propofol orally would not cause death, and they wouldn't be pursuing the theory that Jackson overdosed  by his own hand.

The shocking news that Dr. Conrad Murray's defense team tested the drug Propofol on Beagle dogs to help with his case in the Michael Jackson death trial has outraged PETA so much that they're calling for a federal investigation, saying it would have caused "enormous suffering in the animals."

As RadarOnline.com exclusively reported, Dr. Murray's defense team commissioned a study testing the affects of the powerful anesthetic on Beagle dogs, to bolster their claim that Michael Jackson orally overdosed on the drug.

"I cannot imagine any use for this information at all," PETA's Vice President of Laboratory Kathy Guillermo exclusively told RadarOnline.com. "These tests cause enormous suffering in animals."

Dr. Conrad Murray's defense team commissioned a study on Beagle dogs to determine how much Propofol would have to be ingested to cause Michael Jackson's death, RadarOnline.com is exclusively reporting.

At Murray's preliminary hearing earlier this year, his lawyers asserted that the King of Pop swallowed Propofol, and this is what caused his death.

However, in a dramatic turnaround, attorney Michael Flanagan told Los Angeles Judge Michael Pastor on Wednesday outside the presence of the jury, that they wouldn't be pursuing the theory that Jackson had ingested Propofol.