A statement and then a question in the same sentence?

Here it is:

"I could have killed him many times over, but what would be the fun in that?"

What should I do? Period where the comma should be?

 

It's actually fine how it is, I think; I've see that done many times and it sounds right.

 

Okay, just checking to really confirm it in my mind. Thank you.

 

it is a question, despite how it starts out, so a '?' is the proper end mark...

 

It's right.

 

Sounds good.

When read it takes the reader in one direction, then leaves them with both a hypothetical question and some humour. It made me smile.

 

I like to go against the crowd, but why should I when the crowd is right?