This is the moment a California cop shoots a woman after seeing what he thought was a pistol on her lap. 4 The San Joaquin County sheriff addressed the community about an officer-involved shooting following a traffic stop. San Joaquin County Sheriff's Office4 Erica Lee Johnson was approached during a traffic stop after a report of two women arguing near Stockton. San Joaquin County Sheriff's OfficeShe’s seen saying something to the officer as he stands at her car before the audio turns on, and she’s seen reaching down. Stockton is a city in California’s San Joaquin Valley about 80 miles east of San Francisco.