Shriek was messing with sounds all over the city, so we couldn't even talk. He demanded that Batman hand himself over to pay for making him deaf. And the news was nothing but people saying that Batman should do it and Shriek just wanted justice!

[She'd been angry at the time. She's even more angry now knowing who they were saying should die.]

I don't know how Batman defeated him, but he must have, since the sound interference stopped and Shriek disappeared for a while.