(AP) — A prosecution expert in the trial of a former Wisconsin sheriff's deputy with Lou Gehrig's disease who killed two people testified he has never seen a patient with the disease act violently. Dr. Paul Barkhaus, director of the amyotrophic lateral sclerosis, or ALS, program at the Medical College of Wisconsin in Milwaukee, also testified Friday that he saw nothing in Steele's medical records that would have warranted a referral to a neuropsychologist, according to the Wisconsin State Journal (http://bit.ly/1Q1IcOS ). A defense expert, Dr.