Yes. Domestic violence charges, even at the misdemeanor level, may lead to a host of expensive and painful consequences. Defendants may not even have been aware that their conduct was illegal at the time [for example, blocking a doorway and insisting that they continue to discuss a marital problem can be grounds for arrest].
Sometimes it is unclear whether physical interactions occur out of aggression, self-defense, or other legitimate situations [i.e. wrestling car keys out of the hand of an intoxicated spouse]. It is important to begin to look at possible defenses immediately and for a defendant to avoid making any statement whatsoever regarding what happened until he or she has consulted with legal counsel.