Illegally carrying a concealed firearm is considered a breach of the peace. In Marden v. State, for example, a police officer overtook a man who fit the description of a robbery suspect. The suspect was outside city limits and beyond the officer's jurisdiction. Upon seeing the officer, the man raised his hands, revealing a gun in his belt that had been covered by his jacket. The officer informed the man he was under arrest for carrying a concealed weapon.
The court held that the arrest was lawful because the suspect's concealed weapon constituted a breach of the peace. The officer's action in making an arrest outside his jurisdiction was justified as being within his capacity as a private citizen.
It is the responsibility of the state to determine who will be issued a permit or license to carry a concealed firearm and that each applicant meets all of the requirements before a permit is issued. In Florida, for instance, applicants are required to be U.S. residents, at least 21 years old and free from any physical infirmity that prevents the safe handling of a firearm. Permits are denied to felons and anyone who habitually abuses alcohol or has been committed for controlled substance abuse.
Applicants must desire a legal means of self-defense and demonstrate a competence with firearms (safety training). Those who have been judged incapacitated or committed to a mental institution are denied concealed firearm permits. The same holds true for applicants who have had a felony adjudication of guilt, a withheld or suspended sentence or recent misdemeanors involving violence convictions.
Most of the other states that allow private citizens to carry concealed firearms have similar requirements regarding age, firearm safety training, felony or violent crime convictions and physical and mental health conditions. Thirteen states require civilians to have a specific need for a permit. Firearms are prohibited in eight states (Illinois, Kansas, Kentucky, Missouri, Nebraska, New Mexico, Ohio and Wisconsin), as well as Washington. D.C.