I am a little confused by this complaint, is the vehicle in question just in that location during the hours listed?

yes

Is there a sign that says no parking or no parking between certain hours? If so this may be more of a police matter and I can refer it to the Police Department.

it is being driven around the city.. other then those times.. it is in a parking lot..

Got it. Basically they are using the parking lot as their personal" parking spot".