Okay kiddo, let me explain to you what a killdozer is. Have you ever seen a really big bulldozer? It's like a huge truck with a big blade on the front that can move a lot of dirt and rocks. Well, a man named Marvin Heemeyer had a business in Colorado, and he was really upset because he thought people in the town were treating him unfairly. He decided to take matters into his own hands and build his own bulldozer. But this bulldozer was not like the other ones. He put armor all over it like armor you see on knights, made it bulletproof and almost indestructible, it was like a giant robotic tank.
Heemeyer then drove the killdozer through the town, running over buildings and vehicles and destroying everything in its path. He even went after the town hall, where he thought the people who were treating him unfairly worked. They tried to stop him, but they couldn't because the killdozer was too powerful for them.
In the end, the killdozer was stopped when it got stuck in a building, and Heemeyer took his own life inside the armored bulldozer. It was a very sad and scary situation, and it's not something that should be done. So remember, if you're upset with someone or something, talk to an adult and find a peaceful way to solve the problem, don't destroy things.