An Island County deputy who crashed a motorcycle while he was off duty last month is under investigation for allegedly driving under the influence.

Undersheriff Kelly Mauck said Deputy Henry Schwab, who was injured in the accident, is on sick leave while an internal investigation is being completed. The sheriff asked the Oak Harbor Police Department to perform the investigation, which could possibly result in disciplinary action.

“The sheriff’s office takes very seriously the investigation of alleged employee misconduct,” he said.

The Washington State Patrol reported that Schwab crashed a 2005 Honda motorcycle on West Camano Road on Camano Island at 3:48 p.m. July 21. The 38-year-old deputy failed to negotiate a turn and left the roadway. Schwab was ejected from the motorcycle.

Schwab was transported to Skagit Valley Hospital for treatment. He was arrested on suspicion of DUI, the state patrol reports.

Schwab has worked for the sheriff’s office for about five years, according to Mauck. He is second on the list, based on seniority, to be laid off in upcoming budget cuts.