In his opening statement, defense attorney Ed Chernoff told the jurors that Michael Jackson took enough of the anti-anxiety medication lorazepam to knock out six people.

Chernoff also says the evidence will show Michael Jackson gave propofol to himself, without Dr. Conrad Murray's consent or knowledge. He argues that the combination of lorazepam and propofol created a lethal "perfect storm."

The Los Angeles Coroner's Office investigator found nine lorazepam tablets in Jackson's bedroom on June 26, 2009, the day after he died. Dr. Conrad Murray prescribed the pills in April.

When the investigator returned to Jackson's mansion on June 29, 2009, she found more lorazepam in his closet. She discovered three different vials with no patient or prescribing doctor information.