Prosecutors on Wednesday brought felony charges against an East Bay lawyer accused of trying to pass through the security gate at the Sonoma County courthouse with methamphetamine and another drug.

Shell Kaminsky, 31, of Brentwood, faces possible jail time for the July 17 incident. It happened as she was returning to court to represent a client in an assault trial.

Security guards are alleged to have discovered the drugs in her purse or brief case. She fled on foot but was arrested by a deputy in the parking lot.

Prosecutors asked for additional time before making formal allegations. She was charged with two felonies -- possession of methamphetamine and possession of dextroamphetamine stimulant pills. She was also charged with a misdemeanor alleging she entered a courthouse or state building with contraband.

If convicted, she could face probation or jail, prosecutor Bud McMahon said. She could also enroll in a court program and have the offenses removed from her record.

She was ordered to return to court Oct. 4 and declined to comment.

Kaminsky represented one of five defendants accused of assaulting a father and his daughters at a car show last year in Santa Rosa. Lawyers for other defendants sought a mistrial, saying Kaminsky's actions biased the jury.