An off-duty police officer was allegedly detected drink driving in Lilydale on Friday night (Sep. 20).
The male sergeant, from eastern region, entered a booze bus location on Swansea Rd about 8.30pm.
The 40-year-old man did a preliminary breath test, returning a positive result.
He underwent an evidentiary breath test, returning an alleged reading of .079.
He received an infringement notice for the drink driving offence and his licence has been suspended for six months.