If you're accused of domestic violence in Pennsylvania, you have a number of rights. You have basic rights such as your right to remain silent, not to incriminate yourself under the 5th Amendment of the constitution. You have other basic rights such as the right to be free from unreasonable search and seizure under the 4th Amendment. You have the right to cross-examine witnesses at the given time. You have the right to cross-examine your accuser, the complainant that is, or other witnesses. You have the right to challenge evidence through a motion to suppress, for example. You could try to challenge evidence that was collected if it was, say, unlawfully obtained, or if a statement was given that needs to be challenged. You also have the right to an attorney.
Because domestic violence charges are incredibly serious, you absolutely need to exercise your rights. You need to have an experienced Pennsylvania criminal defense attorney in your corner from as early as possible in the process to help you build the best defense and help you understand and navigate the criminal process.