Need a Resisting Arrest or Obstructing Police Officer Defense Attorney Chicago? Call The Davis Law Group, P.C. in Cook County at (847) 390-8500.Resisting or obstructing a peace officer, firefighter, or correctional institution employee. (a) A person who knowingly: (1) resists arrest, or Under the definition of "knowledge" in the Criminal. Obstructing justice is a Class 4 felony offense for which the punishment can be 13 years in prison (Department of Corrections). Obstructing justice. Freidberg has decades of experience in his criminal law practice helping people charged with resisting arrest or other obstruction offenses. Finally, the prosecution must show beyond a reasonable doubt that you were, in fact, resisting or obstructing arrest. Recent laws may not yet be included in the ILCS database, but they are found on this site as Public Acts soon after they become law.