Michael Jackson's Fingerprints Not on Drug Vials Recovered From His Bedroom

Lab results failed to find Michael Jackson's fingerprints on syringes, drug vials or other medical evidence taken from his mansion after his death, jurors were told Thursday during the manslaughter trial of the singer's doctor Conrad Murray.

While lawyers for Jackson's physician argue the singer gave himself a fatal dose of powerful anesthetic propofol on June 25, 2009, technicians identified only a single fingerprint, matching Murray's index finger, on a vial of the anesthetic found at Jackson's bedside, the Los Angeles Times reported.

Murray, 58, on trial at the Los Angeles Superior Court, has pleaded not guilty to involuntary manslaughter.

The court heard Thursday that unidentified fingerprints, not matching those of Murray, Jackson, the singer's security guards, his personal chef or crime-scene investigators, were also found on another bottle of propofol and two intravenous bags.

Lawyers for Murray spent the first half of the eighth day of his trial calling into question key evidence against him, including the medicines and medical equipment found next to his bedside, Sky News reported.

Coroner's investigator Elissa Fleak had earlier told the court she found a large collection of drugs and medical paraphernalia in the pop star's bedroom and wardrobe.

In aggressive cross-examination, Murray's lawyer Ed Chernoff questioned Fleak's recollection, suggesting she had made a "substantial number of mistakes" in her investigation of the scene.

He highlighted that she had destroyed her original notes, left a thumb print on a syringe, and showed the court photos with latex gloves on a chair in the singer's bedroom, when her report said they were on the floor.

Fleak admitted that she has never conducted a "perfect" investigation, but insisted it was common practice to destroy original notes once the detail had been recorded in a formal report.

In a blow to the defense, she said she had requested Jackson's medical records, but that when she received them there were no records past April 2009. The singer died in June of that year.