Re: Drunk in Public Charges
I doubt that the police never told you why you were going to jail. In any event, you were apparently informed of the charges at the jail.
Also, a sobriety test is not required. All the police must show is that you had consumed alcohol, and that you were somehow unable to care for yourself or the safety of others ... this usually involves fighting, arguing, stumbling, etc.
Fortunately for you, these charges are rarely filed and most are simply disposed of by the arrest or the suspect is released pursuant to PC 849(b) indicating that the "arrest" will be considered a legal "detention" only. Even if it goes to trial, this tends to be about as low level an offense as you can get.
A Nor Cal Police Sergeant
"Make mine a double mocha ...
... and a croissant!"
Walk humbly with your God
-- Courageous, by Casting Crowns