Perhaps you are thinking of "Barricade", a Decepticon character who appears in the first Transformers movie, "Transformers" (2007).
In the film:
* Barricade is a Decepticon police car that is one of the first to arrive on Earth.
* He is a loyal servant of Megatron, the leader of the Decepticons.
* He is known for his brutal and ruthless tactics, as well as his hatred of humans.
* In the film's climax, he engages in a fierce battle with the Autobots and is ultimately destroyed by Optimus Prime.
If you are referring to a different character, please provide more information.