does a police car stay at a house a long time after ambulance has been gone if its a fatal ambulance call ? (neighbor house they are 86 85)?

under some circumstance yes.

I guess they can to see if they can arrest some one, so they can keep their job. Then go too stores and get hand outs for free and free hamburgers and fries, that walk in hamburgers places saying give me food I’m a cop! Free food I’m a cop free food I was in the navy free food I arrested I homeless person, that was hungry for food but free food for me!

It may depend on the state law. In Florida, the law says that every death is suspicious until the coroner says it isn't. Even if a person was diagnosed with terminal cancer, when death occurs, the police make everyone leave the house and they search for evidence of a crime. 

ya, they like to hang around a while. 

Depends on the situation