He used scissors, authorities say, to sever the spinal cords of newborns who emerged from their mothers still alive.
Now Dr. Kermit Gosnell, 72, is about to stand trial. He has pleaded not guilty. If he's convicted, prosecutors want him put to death.
"A doctor who cuts into the necks severing the spinal cords of living, breathing babies, who would survive with proper medical attention, is committing murder under the law," Philadelphia District Attorney Seth Williams said.