An 18-year-old driver who tossed a liquor bottle from his car as it weaved along Old Redwood Highway remained in custody Tuesday, suspected of drunken driving, littering and being an unlicensed driver.

The young man was one of 18 people arrested during the weekend by CHP officers investigating drunken driving and drug violations, said Officer Jon Sloat, CHP area spokesman.

Late Saturday night a citizen alerted CHP Officer Thomas Barto to an apparently intoxicated driver leaving a Larkfield gas station on Old Redwood Highway.

As the officer drove up to the weaving VW hatchback, he saw that it didn't have its headlights on and saw the driver toss a liquor bottle out the window, Sloat reported.

When the officer began to pull over the car, the driver pulled into a nearby shopping center. He fell to the ground as he was getting out of the car and was unable to perform sobriety tests, Sloat said.

The officer arrested 18-year-old Juan Manuel Rodriguez-Tapia.

The young man, who has an address in Mexico, was taken to the Sonoma County Jail. His suspected crimes resulted in a $5,000 bail but his immigration status resulted in his being held without bail for a federal review.

His car also was towed for a 30-day impound.

A 30-year-old Sebastopol man convicted last spring for drunken driving was arrested during the weekend on the same charge.

Daniel Morrow was stopped at 6:40 p.m. Saturday on Highway 116 near Fredericks Road when an officer believed Morrow was following another vehicle too closely.

Morrow, who was almost unable to stand, was arrested on suspicion of drunken driving and violating his parole.