Answer:
If Mr. Joe Smart has been legally arrested for "D.W.I.". and The officer searches Smart and finds a switch blade knife with a blade 4.5 inches long on his person. In addition to D.W.I., Mr. Smart may be charged with possession of a weapon. because the blade is 4.5inch long and it illegal to carry such long blades and he may be prosecuted for carrying illegal weapon.
Explanation:
charges: this is to formally accuse someone under the law for something.
