California driver arrested after 'fully loaded AR-15,' 'It' clown mask found in car, police say

A California man was arrested during a traffic stop Sunday after police discovered a “fully loaded AR-15” rifle and a clown mask from the horror movie “It” in the back seat of his vehicle, authorities said.

Officers executed a probable cause search of the vehicle and found an AR-15 with a 50-round drum magazine and a bullet in the chamber, according to police. An "It" clown mask and an unspecified amount of marijuana were also found in the vehicle. The suspect was booked into jail on multiple drug and weapons violations.