A judge orders the Philadelphia District Attorney to charge the engineer of the 2015 Amtrak train derailment. Five days before the primary, we take stock of the race for the D.A.’s office. A new program in Camden offers support and training to families caring for Alzheimer’s patients. In the midst of the opioid epidemic, private equity companies have been buying up private treatment centers. A concert series and exhibit opens, of the music of the late composer Julius Eastman, a Curtis Institute alumnus.