Technically speaking, it would be "family" that represents a social group that exists in all known cultures, since families are generally crucial for the survival of the individual.
If you are handcuffed, you are under arrest. Miranda rights, however, apply only to questioning. If you were not questioned, or made statements voluntarily before being handcuffed, the fact that you were not read your rights is not grounds for a dismissal.
Because it had a great effect on history.
