PITTSBURGH (AP) — Jurors who convicted the gunman in the deadliest antisemitic attack in US history will begin hearing arguments Monday on whether he should be put to death. The sentencing phase is expected to last at least four weeks in the case of Robert Bowers. He killed 11 worshippers and injured others in an attack on three congregations meeting at the Tree of Life synagogue in Pittsburgh on Oct. 27, 2018. Jurors convicted Bowers on June 16 on all 63 charges he faced. Prosecutors will try to prove there were aggravating factors making the crime worthy of execution. Defense lawyers admit he carried out the attack but say he has mental illness.