NEW : Dr. Klein injected 6,500 mg of Demerol into Jackson , the defense says . NEW : Jackson 's insomnia could have been caused by drugs , a sleep expert says . He is expected to be the next and last witness for the direct presentation of the prosecution 's case against Murray . Note : Trial could end early , judge says . Anesthesiologist , Steven Shafer may be the prosecution 's last witness .
NEW : Dr. Klein injected 6,500 mg of Demerol into Jackson , the defense says . NEW : Jackson 's insomnia could have been caused by drugs , a sleep expert says . Note : Trial could end early , judge says . Anesthesiologist , Steven Shafer may be the prosecution 's last witness .