PITTSBURGH (AP) — A gunman who massacred 11 worshippers at a Pittsburgh synagogue has a “very serious mental health history“ from childhood and a “markedly abnormal” brain, a defense expert testified Wednesday in the penalty phase of the killer’s trial. Defense lawyers for Robert Bowers are trying to persuade a jury to spare his life, while federal prosecutors are seeking a death sentence for the 50-year-old truck driver from suburban Baldwin, who was convicted this month in the deadliest antisemitic attack in U.S. history. Dr. Siddhartha Nadkarni, who performed a neurological examination of Bowers in 2021, took the stand as...