See Romans 12:17 & 21. The premise of not returning evil for evil but rather return good for evil is apparent in the two verses.
We are to return evil with good if the evil is done to us. Not if the evil is done to others...The only person that can forgive that doctor is the babies he killed. Therefore there is no forgiveness for him...we certainly don’t have the power or the right to forgive evil done to another..Thats like me saying, gee you killed that baby but I forgive you...it just ain’t going to happen..