NEW : Expert finds no evidence Jackson ever took or used illegal drugs . He said it is not inconsistent for an addiction to go into remission . NEW : No evidence Jackson used more drugs than doctors prescribed , expert testifies . Jackson 's mom and children contend that Live is liable in the singer 's death . AEG Live argues it could not have known about Jackson 's drug use .
NEW : Expert finds no evidence Jackson ever took or used illegal drugs . NEW : No evidence Jackson used more drugs than doctors prescribed , expert testifies . Jackson 's mom and children contend that Live is liable in the singer 's death . AEG Live argues it could not have known about Jackson 's drug use .