A Santa Rosa man was arrested in Petaluma on suspicion of driving while intoxicated early Thanksgiving Day after Petaluma police said he was measured to have more than three times the legal limit for alcohol in his system.

Gary Reab, 22, was one of four people arrested on suspicion of drunken driving late Wednesday and early Thursday. Petaluma police had extra officers on patrol to check for drunken drivers, as people returning home for the holidays tend to go out drinking — and then drive — the night before Thanksgiving, Sgt. Paul Gilman said.

Around 2:30 a.m., an officer was investigating a driver for possible DUI in a parking lot at 905 East Washington St., by the fairgrounds, when a man drove into the parking lot in his pickup and “was having a lot of trouble parking his vehicle,” Gilman said.

The officer evaluated the driver, identified as Reab, and found that his blood alcohol level was 0.25 percent — more than three times the legal limit of 0.08, police said.

Police later learned that Reab’s vehicle had just been reported as a possible DUI by the CHP, who had spotted it driving down Highway 101.

Reab was arrested and booked into county jail.