State Senator Russ Decker attended a reception where beer was served with lobbyists for the tavern industry hours before his drunken driving arrest this week.
Decker and other lawmakers paid five dollars for food and as much beer as they wanted to drink. The reception at a hotel in downtown Madison was hosted by the Tavern League of Wisconsin.
The state Ethics Board is looking into whether the reception complied with state rules governing lawmakers. Decker, who resides in Schofield in Marathon County, represents parts of Rusk, Sawyer and Taylor Counties in state senate.
Lawmakers can attend such events, but they must pay the actual costs of any food and drinks served.
Decker was arrested in a Madison suburb around about 11:00pm Tuesday.
He has apologized for drinking and driving, calling it a terrible mistake for which he takes full responsibility.
Police still won't say how much alcohol was in Decker's system at the time.