An Iowa City woman and a Cedar Rapids woman face drug charges after a traffic stop conducted Sunday evening.

According to a complaint by Iowa City police, Cassandra McWane and Evelyn Chinchilla, both 21, were stopped for having no plates on their vehicle. Chinchilla — who was driving the vehicle, according to the complaint — was barred from driving.

The complaint said officers observed open containers of alcohol in the vehicle, and a K9 reportedly alerted officers about an odor of illegal drugs. A search was conducted, and a glass marijuana pipe and scale with marijuana residue were allegedly found in Chinchilla’s purse. The officers also searched McWane, who allegedly had a piece of marijuana stuck to her shirt. McWane then allegedly retrieved a plastic bag of marijuana from the front of her pants.

The complaint said that Chinchilla had watery, bloodshot eyes and exhibited signs of impairment. The complaint said a police drug-recognition expert determined Chinchilla was under the influence of marijuana. She allegedly admitted to smoking about six large blunts of marijuana throughout the day.

Chinchilla was charged with OWI and possession of a controlled substance. McWane was also charged with possession of a controlled substance.

— by Matt Starns