Need help for a scene in a crime drama film.?

I am making a detective crime drama film and I need help for a scene.
In the film these two detectives find a dead body in the house. Who
would they call for what they found? The police? The paramedics? Crime
labs? I need help here.
I know this question may sound stupid. But I want this film to be as
accurate as possible. I just need to confirm a few things I am unsure
about.