Criminal Mischief greater than $200 but less than $1000.00 is a misdemeanor of the first degree. The maximum you could receive is 1 year in the county jail, 1 year of probation, $1000.00 fine or any combination of the three. Because you have no prior criminal record you maybe eligible for a pretrial diversion program. A pretrial diversion program would consist of a supervision period, restitution, community service and any other conditions the State Attorney's Offer would require. The benefit of the pretrial diversion program is that if you do everything the State ask they will dismiss the case in the end. Whether or not you receive the pretrial diversion program will be dependent on several factors including whether or not the alleged victim agrees to the State offering you the program. One of the benefit of retaining an attorney is that they can explore the pretrial diversion program option with the prosecutor. If the diversion program is not an option, an attorney can discuss alternative offers to try and prevent you having a criminal record if you decide to take a plea. Also keep in mind that an experienced attorney can review the evidence the State intends to use against you to see if the State can prove the case or not. Before you decide to taken any option whether to take a diversion program if offered, a plea or take the case to trial, you need to be fully educated on what evidence the State actually has against you.
That is a really detailed and thorough answer by Mr. Phillips. You should definetly hire an attorney, the State Attorney's Office in Lake County can be difficult and seek penalties more harsh than most places in this area.
Although AVVO answers provide a starting point, nothing replaces the opinion of a qualified DUI defense attorney knowledgable about the Judges and prosecutors near you. You should consult a local lawyer for legal advice.