>>1764257Punishment wears many hats. Leaving aside this specific scenario, you want punishment to do one or more of these things:
1.) Demonstrate to other members of society that this behavior isn't acceptable.
2.) Prevent the malefactor from re-engaging in this behavior in the future, whether through discouragement, permanent containment, or liquidation.
3.) Placate the victim or the victims' kin by inflicting retribution on the malefactor (this is the core element of all justice - revenge).
4.) Inflict suffering on a malefactor who is not remorseful.
In Sunny's case, his suicidal self-loathing is probably punishment enough.