In my story, the a witness is testifying against a gang in a case. Since she is a witness and her life may be in danger as a result, the police assign a cop to watch her from a squad car, outside her house, and call for back up, in case anything happens to her. I did some research as to what the police would do, but found the real life results to be kind of problematic for my story. Basically if intruders break into a house and a cop sees possible intruders in the windows, I was told by police that the cop is not allowed to go inside procedure wise, because doing so, would put the house owner in further danger likely. The cop is to stay put and wait for back up. Once back up arrives, they are still to remain put, and wait. It is even a bad idea for the police to announce that they are there, because doing so, can create a hostage situation. But if the police are not allowed to announce that they are there, and are not allowed to go inside, and the real procedure is to just keep waiting and waiting to see what will happen, the house owner can be killed by the gangsters, which is what I don't want for my story. I want the owner to be saved so the story can go in the directions I want it to go, but if the police are just suppose to wait, and not do anything, then she dies. So is their anything I can do to write it, so that the cop does save her, but at the same time, be realistic about it? I would like to write it so that he feels compelled to save her, without waiting for back up, even though they are coming, thinking that time is of the essence, cause I wanted to write, so that it's one man, in a dark house, sneaking around, and just creating suspense that way. But can make it work realistically, if it's not normal procedure?