The driver of an emergency vehicle still has an obligation to exercise "due regard" to other traffic even when responding to an emergency, even though the driver may be allowed certain exemptions.
In the scenario you describe the fire truck came through a red light at a blind intersection without stopping. The vehicle was exempt from making a complete stop, but the driver may not have exercised due regard to cross traffic by continuing before ensuring it was clear to do so.
There is something worth investigating here that may absolve you of your problem, but you will likely need legal assistance to see it through. I suggest you visit a reputable traffic attorney in your area. Hopefully you have contact information for your witness.
I disagree. What you describe does not amount to inattentive driving. An attentive driver can still fail to see or hear emergency lights and sirens (would a deaf driver be cited for being inattentive?). More information would be needed to justify this citation-- the fact that a collison occurred is not sufficient. Collisions occur all the time without people being cited for being inattentive.
§ 4134 Operation of vehicles on approach of authorized emergency vehicles.
(a) Upon the immediate approach of an authorized emergency vehicle making use of audible or visual signals, or of a police vehicle properly and lawfully making use of an audible signal only, the driver of every other vehicle shall yield the right-of-way and shall immediately drive to a position parallel to, and as close as possible to, the right-hand edge or curb of the roadway clear of any intersections and shall relinquish the right-of-way until the authorized emergency vehicle has passed, except when otherwise directed by a police officer.
(b) Upon approaching a stationary authorized emergency vehicle, when the authorized emergency vehicle is giving a signal by displaying alternately flashing red, blue, blue and white, red and white, red and blue, or red, white and blue lights, or upon approaching a stationary authorized vehicle of the Department of Transportation, which is giving a signal by displaying alternately flashing amber or red and amber lights, or upon approaching a stationary tow truck, which is giving a signal by displaying alternately flashing amber, white, or amber and white lights, or upon approaching a stationary vehicle owned or operated by a public utility, which is giving a signal by displaying alternately flashing amber, white, or amber and white lights, a person who drives an approaching vehicle shall:
(1) Proceed with caution and yield the right-of-way by making a lane change into a lane not adjacent to that of such vehicle, if possible with due regard to safety and traffic conditions, if on a roadway having at least 4 lanes with not less than 2 lanes proceeding in the same direction as the approaching vehicle; or,
(2) Proceed with caution and reduce the speed of the vehicle to a safe speed while passing such stationary vehicle, if changing lanes would be impossible or unsafe.
(c) This section shall not operate to relieve the driver of an authorized emergency vehicle from the duty to drive with due regard for the safety of all persons using the highway.
(d) Any person violating subsection (b) of this section who hits, strikes, or in any way contacts an emergency responder, causing physical injury, with that person's vehicle shall be guilty of a class F felony.
21 DE Code § 4176
(a) Whoever operates a vehicle in a careless or imprudent manner, or without due regard for road, weather and traffic conditions then existing, shall be guilty of careless driving.
(b) Whoever operates a vehicle and who fails to give full time and attention to the operation of the vehicle, or whoever fails to maintain a proper lookout while operating the vehicle, shall be guilty of inattentive driving.
