Here Are the badges of The Mad Murderer. There are 11.
You won as The Murderer!

Badge Description: W00T!
You earn this badge by Winning as the murderer.
OH BABY A TRIPLE!

Badge Description: Hmm... maybe the ghost knife will help?
You earn this badge by using the ghost knife or exploding knife.
ILLUMINATI ALERT

Badge Description: NOBODY BLASTS 6 PEOPLE IN ONE THROW! ILLUMINATI ALERT!
You earn this by killing 6 people with the Exploding Knife.