At one time, it was not illegal to defend yourself if someone attacked you on the streets. However, ina few states, if you retaliate when assaulted, both parties are arrested, even though you were merelydefending yourself against the attacker.
This is sounds like insanity, but the laws has determined that "word against word" is the issue; thus,the crime should be taken to court to determine what caused the incident, why the incident occurred,and who is responsible for the crime committed. If there is a third party involved in the act--rather ifa third person intervenes in an attempt to protect the victim--it may fall under the "alter ego rule" orrather the third person is permitted to defend the victim on particular grounds.
Under the Texas Penal Codes, for example, the law states that under a defending act of a third party,that the person is legally excused if this persons utilizes "force against another to... [protect the thirdparty.]" This person cannot use this action if he feels that the third party is in no danger; however, ifthe party feels that the victim is in a life threatening situation, or else brutality is involved, then thisperson must use thoughtful consideration in taking action to protect the third party.
Other states may only permit the party to restrain the culprit until the police arrive. Yet, few stateswill consider this act a Citizen's Arrest, where the party holds the culprit temporarily in his⁄hercustody until the police arrive at the scene of the crime. For more information on self-defense, checkyour local state laws. This is crucial because your stay may have completely different laws than thelaw cited above from the state of Texas–and if you have to defend yourself in court, you will want toknow what those laws are and if they work in your favor or against you.