Police are n't disclosing how Zawahri obtained guns used in rampage . Slain gunman John Zawahri hopes his father 's estate will support his mother . Comment: U.S. Justice Department said he was ineligible to buy a weapon in 2011 , police say .
Police are n't disclosing how Zawahri obtained guns used in rampage . Slain gunman John Zawahri hopes his father 's estate will support his mother . The handwritten letter `` was more of a farewell , '' police chief says . U.S. Justice Department said he was ineligible to buy a weapon in 2011 , police say .