The Los Angeles County Coroner's investigator who examined Michael Jackson's body and bedroom has been accused of making "mistakes".

Elissa Fleak was questioned in Los Angeles Superior Court this morning (06.10.11) by lawyers acting for Dr. Conrad Murray - who is accused of the involuntary manslaughter of the singer in June 2009 - and was quizzed by defense attorney Ed Chernoff on some of her atypical practices.

After saying she always destroys her investigation notes, Elissa admitted she failed to dispose of her documents from a second trip to Michael's house on June 29, four days after his death.

She said she kept the notes because it was unusual to require a second trip to an investigation scene, but Mr. Chernoff said: "Would you agree with me that you made a substantial number of mistakes in investigating this case?"

The witness said: "No."

The investigator also admitted she had picked up a bottle of flumazenil from the floor of the 'Thriller' hitmaker's bedroom before taking photographs and said she apparently left a partial fingerprint on a syringe found in the room.

Noting she usually wears gloves, she said: "I found that [the fingerprint] out later."

Explaining she thought the fingerprint may have transferred as tables were moved around the room, she added: "I don't remember if I was wearing gloves when the tables were moved.

Chernoff asked her: "You don't consider any of that a mistake?" but she responded "no".

Murray denies charges of involuntary manslaughter but faces up to four years in prison if convicted.

The case continues.