Can anything I say be used against me in court?
Absolutely anything that you say can be used against you in court. Many time the police will just ask what you consider to be a non-harmful question. Like, "Were you home on Thursday?", Which puts you in the city. If they have an admission and you say yes, it puts you in the city. "Where do you live?", "I live on Main Street in Santa Monica," they put you in the county. Otherwise if they were charging you with a crime they might have to prove that you were even in the state.