What could make killer become kinder? (6,2,5)
I believe the answer is:
change of heart
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for change of heart that I've seen before include "second 5 [THOUGHTS]" , "Having a different view" , "Conversion (to kinder action?)" , "Profound shift in outlook" , "Profound alteration in outlook or opinion" .)