A federal judge has ruled defense lawyers for Lee Baca will not be allowed to call an Alzheimer’s expert to testify at the former L.A. County Sheriff’s upcoming corruption retrial. U.S. District Court Judge Percy Anderson granted in a written ruling the prosecutors’ motion to exclude the testimony of Dr. James Spar, who defense lawyers said would tell jurors it was possible Baca was suffering from the early effects of Alzheimer’s disease during one relevant event. “Evidence linking defendant’s current diagnosis to the charges is entirely speculative and inadmissible, is the product of unreliable methodology, artificially limited facts, and bare...