Final answer:
Malicious mischief in the third degree is a criminal offense in Washington State that involves knowingly causing physical damage to another person's property. It is typically considered a misdemeanor offense.
Step-by-step explanation:
Malicious mischief in the third degree, as defined in RCW 9A.48.090, is a criminal offense in Washington State. It involves knowingly and maliciously causing physical damage to the property of another person, the value of which is less than $750. Examples of malicious mischief in the third degree include keying someone's car, smashing windows, or graffiti tagging on private property without permission.