Officer Virgilio said he would request additional charges against Williams including reckless endangerment, because he threw a rock that hit a window in the family's car, "directly next to an 8-year-old girl."
"Had the glass shattered or the rock had penetrated the window it could have struck and harmed the 8-year-old victim," he said.
Williams began his career as a stand-up comic, gaining attention in 1999 for comedy club appearances. Television appearances on the BET Network led to more success.
His 2006 HBO special "Katt Williams: Pimp Chronicles Pt.1" raised his profile to a higher level.
He has acted in several movies -- including Eddie Murphy's "Norbit" -- and he is the voice of popular cartoons, including "The Boondocks."
His often-raunchy style has drawn comparisons to comedy legend Richard Pryor.