Under the influence in San Diego, CA

[56lucy]

Last night while sitting in the passenger sit my friend got pulled over for a broken head light (in San Diego CA). After his situation was cleared one of the officers asked me to exit the car and started asking me a lot of questions accusing me for being under the influence. To make a long story short I ended up getting arrested for the charge: 11550(A) HS.
My questions are
1: if I was not driving, not disturbing the peace, not even walking in public why did I get arrested for being under the influence
2: what should I expect next (considering I have prior record regarding drugs and also assuming the drug test I took after getting arrested would reveal the truth… that I was under the influence)
Thank you very much in advance

That was his call. But you can defeat that if you take that to court.

If you do challenge it you must have a lawyer do so. Don't do it yourself.