Why is an undercover cop in my neighboorhood help!?

How do you know he is a police officer???? Is he wearing a uniform/badge/gun/etc.??? If you know he's an undercover police officer, why do you describe him as "undercover"? If he were an undercover police officer, you would not know. If you are concerned about it, you can call the local police/sheriff non-emergency number and report it if you would like. If they do not come, that means they probably know who it is, although, more than likely they will come.