Who polices Portland
Portland has its own police department. Arrests in town are made by Portland officers, who book you and either release you on a promise to appear or set a bond.
Route 66 runs through the town and carries a share of the traffic enforcement, some of it by state troopers. Whichever agency stopped you, the case is prosecuted in the same place.
Where your case goes
Portland cases go to Middletown Superior Court, GA 9, directly across the river, which makes this one of the shorter trips to court in the district. That is not a reason to leave late: the building houses two courts and the morning docket may be busy.
Released, your date is on your paperwork. Held, court is the next business day.
After the arrest
The bond decides the next few days. Released on a promise to appear or after posting, you have a date; held, you are in court the next business day and a judge revisits the amount. See the arrest page and the bond and bail page.
Do not explain the incident to the officers or to anyone else involved, and do not treat a holding call as private, because it is recorded.
Family violence means court the next business day regardless, with a protective order issued at that appearance which can order you out of your own home. The arraignment page explains the date; the what to expect page explains the case.
Common charges in Portland
Route 66 work puts DUI and drug possession among the more common Portland charges at GA 9, alongside assault, domestic violence and family violence, and larceny and shoplifting. A first offense frequently qualifies for a diversionary program that ends in dismissal.