Brian Bothun, a reporter for the Daily Post, was cited and released by Menlo Park police early Saturday morning on suspicion of being under the influence of a controlled substance.
Bothun, 46, of Atherton, reportedly become involved in a dispute between two other motorists at 2:34 a.m. at Ravenswood Avenue and El Camino Real and a Menlo Park officer did a field sobriety test.
Bothun was then cited and released.
Bothun was suspended from the Daily Post the next day by Dave Price, the paper's owner and editor. The Daily Post reported the incident and Bothun's suspension in its Monday edition.
"We don't know what the controlled substance was," Nicole Acker, Menlo Park Police Department spokeswoman, said. The case is being referred to the San Mateo County District Attorney's office, Acker said.
Bothun had previously worked as a reporter and editor for the Palo Alto Daily News.