Do I speak to the investigator?

It's important to remember that you are under no obligation to speak with the police during an investigation. In fact, allowing your emotions to get the best of you and speaking without thinking can get you in worse trouble.

Do I need to hire an attorney before talking to anyone?

Being polite and respectful to police will help you in the long run. Additionally, getting an attorney to advise you is one of the most important things you can do in such cases. The attorney will walk you through the steps and responses that will help you avoid an unfair investigation.