SceneNibbler had been covertly snooping around while everyone lay asleep. To Leela and the others, he was just a cuddly but voracious pet, who's feces had been known to get them out of trouble on a few occasions. In reality, he was a vigilant member of the Nibblonians, sworn protectors of sentient life in the galaxy. Plus, he had an adorable little spaceship to fly around in. This night, he had been on the lookout for suspicious looking people who were undoubtedly out to destroy the Earthican government, be they human, robot, or otherwise.
As he parked his spaceship in the garage, he noticed something glowing in the corner. Approaching it, he realized that it was a Doomsday device, and the counter had just reached 0. The resulting implosion left no clue that the garage, ship, and Nibblonian ever existed, and with a little "plip" sound, Nibbler was gone.
Talapus, Nibbler,
Town Sane Cop has been killed!
- Click image to enlarge.

Meanwhile, a man walking down the street was accosted by a gigantic figure, with orange eyes and a red coat.
"You've been very very naughty!" bellowed the assailant, as he threw what looked like an ornament at the man's feet and then flew away.
The man suddenly realized that the shiny metal orb was actually a grenade, but before he could escape, the grenade blew up, impaling him with several shards of razor sharp holiday cheer.
He woke up on a table a few hours later, with a lobsterlike creature staring down at him.
"My word, you had the worst case of fin rot I ever saw" exclaimed the lobsterman, peering down at him.
"Um, I don't even have fins" the man exclaimed.
"Oh...well, I thought I removed your swim bladder, but I haven't been sure since medical school" said the doctor, holding up a kidney.
"Well thanks for saving my life anyways" mumbled the man as he hurriedly left the room.
Feeling pleased that he managed to not kill a patient, Dr. Zoidberg went to clean up his supplies. A knock on the door interrupted his work.
"Maybe presents for Zoidberg?" he wondered, as he opened the door.
It was not presents, as a shadowy group grabbed and and proceeded to turn his insides into a horrifying but strangely delicious smoothie.
nagerous, Dr. Zoidberg,
Town CPR Doctor has been killed!
- Click image to enlarge.

It is now Day 2, with 15 alive, it takes 8 to lynch.