Honestly? Yes. He's the kind of character who'd feel pure solace knowing that he got rid of the monster tha caused Ai-chan's misery. He'd spend 10 years in prison like Andy Duffrane in Shawshanks Redemption and continue a happy life. ESPECIALLY if his sister kept building a life on the outside that he can return to. Plus Akane.
Also what shinta said. If the combined intellect of Aqua and Akane cannot come up with a plan that doesn't end with prison time, nobody can.