After a massive deadly zombie attack, a brave and honorable, brought back to life, police officer wants to save his town and citizens from the bloody carnivores. He goes towards achieving his goal in order to kill the last zombie leader and become “alive” again.

Hello Miros!

>>>After a massive deadly zombie attack...
By??? ?....Or is it an Outbreak?

>>>brought back to life...
by whom? from which state?

>>>wants to save his town and citizens from the bloody carnivores...
Loglines are not about what your protagonist WANTS to do, rather what he MUST do as a result of the Inciting Incident

Currently it reads as:
"A cop must kill zombie leader to save town from the apocalypse"

Also, focus on what makes it different from hundreds of other zombie films

Good Luck!