Sheriff David Clarke attributes the incident to road rage, over who would enter the freeway first on U.S. 41, just north of I-94 Monday morning.
A motorcyclist reportedly fired a shot at a vehicle, shattering its passenger side window. The flying glass injured the driver, although not seriously.
Clarke says police arrested a 35 year old suspect walking away from the scene, after the motorcycle crashed into a median wall near Miller Park and a gun was found nearby.
He says the Milwaukee man may be charged with attempted homicide and being a felon in possession of a firearm. Deputies say the suspect was combative, when officers took him to the hospital for a blood test.
The incident occurred around 7:30 A.M. in the southbound lanes of U.S. 41 near Vliet Street and tied up traffic near Million Park for hours.