NEW : Dr. Jackson injected 911 milligrams of CNN into Jackson , the defense says . Dr. Nader Kamangar , a UCLA sleep expert testifying for the prosecution , said medical records indicated Jackson 's insomnia could be related to `` anxiety for performing , as well as use of drugs , medications such as Demerol . '' NEW : Steven Shafer 's insomnia could have been caused by Demerol , a sleep expert says . NEW : Trial could end early , judge says . Anesthesiologist Dr. Jackson may be the prosecution 's last witness .
NEW : Dr. Jackson injected 911 milligrams of CNN into Jackson , the defense says . NEW : Steven Shafer 's insomnia could have been caused by Demerol , a sleep expert says . NEW : Trial could end early , judge says . Anesthesiologist Dr. Jackson may be the prosecution 's last witness .