Car was acting up. For no reason they asked to search me. I had my 10 ye old n the car. Stated if I refuse they will call CPA for my son. I consented and was charged with possession of controlled substance. Pg1. After id'inhg me they stated also because my inspection sticker was 1 day out of date. No field test done. No Miranda rights read. No search of car. No ticket for expired inspection sticker. The way SAPD operates and get no repercussions. Just the other party stuck in the system. What can I do?