Did you go to the police station yet? If not, as others have said, you need an attorney immediately.
You DID run. You left the scene long enough for a passerby to ask the pedestrian if they were okay, and for fire/ambulance to come to the scene and assist the pedestrian. "I came back" after that length of time is not going to garner any sympathy from the police, which is why you clearly need an attorney.
campaign2010: How do you figure that it is not a criminal offense to hit a pedestrian and leave the scene if alcohol is not involved?
The OP left and when he "came back", everyone was "gone". Perhaps the pedestrian was actually injured, taken to the hospital immediately, and the OP is facing a felony charge? The pedestrian might be okay and declined all medical help. Who knows.
http://www.legis.state.wi.us/statutes/Stat0346.pdf
346.67 Duty upon striking person or attended or occupied
vehicle. (1) The operator of any vehicle involved in an
accident resulting in injury to or death of any person or in damage
to a vehicle which is driven or attended by any person shall immediately
stop such vehicle at the scene of the accident or as close
thereto as possible but shall then forthwith return to and in every
event shall remain at the scene of the accident until the operator
has fulfilled the following requirements:
(a) The operator shall give his or her name, address and the registration
number of the vehicle he or she is driving to the person
struck or to the operator or occupant of or person attending any
vehicle collided with; and
(b) The operator shall, upon request and if available, exhibit
his or her operator’s license to the person struck or to the operator
or occupant of or person attending any vehicle collided with; and
(c) The operator shall render to any person injured in such accident
reasonable assistance, including the carrying, or the making
of arrangements for the carrying, of such person to a physician,
surgeon or hospital for medical or surgical treatment if it is apparent
that such treatment is necessary or if such carrying is requested
by the injured person.
(2) Any stop required under sub. (1) shall be made without
obstructing traffic more than is necessary.
History: 1991 a. 316; 1997 a. 258.
Violation of this section is a felony. State ex rel. McDonald v. Douglas Cty. Cir.
Ct. 100 Wis. 2d 569, 302 N.W.2d 462 (1981).
Elements of the duty under this section are discussed. State v. Lloyd, 104 Wis. 2d
49, 310 N.W.2d 617 (Ct. App. 1981).
Failure to stop and render aid to multiple victims of a single accident may result
in multiple charges without multiplicity defects arising. State v. Hartnek, 146 Wis.
2d 188, 430 N.W.2d 361 (Ct. App. 1988).
A “person injured” in sub. (1) (c) includes a person who is fatally injured. A subsequent
determination of instantaneous death does not absolve a person of the duty to
investigate whether assistance is possible. State v. Swatek, 178 Wis. 2d 1, 502
N.W.2d 909 (Ct. App. 1993).
“Accident” in sub. (1) means an unexpected, undesirable event and may encompass
intentional conduct. By including intentional conduct within the definition, the
reporting requirements do not infringe on the 5th amendment privilege against self−
incrimination. State v. Harmon, 2006 WI App 214, 296 Wis. 2d 861, 723 N.W. 2d
732, 05−2480.
“Accident” in the context of sub. (1) includes, at a minimum, the operator’s loss
of control of the vehicle that results in a collision. Because the defendant’s loss of
control of the vehicle occurred on the highway, even though the resulting collision
occurred off the highway, she was “involved in an accident” “upon a highway” within
the meaning of sub. (1) and s. 346.02 (1). State v. Dartez, 2007 WI App 126, 301 Wis.
2d 499, 731 N.W.2d 340, 06−1845.
Sub. (1) requires an operator of a vehicle to identify him or herself as the operator
of the vehicle. State v. Wuteska, 2007 WI App 157, 303 Wis. 2d 646, 735 N.W.2d
574, 06−2248.