"Duty to intervene" means an obligation to intervene to prevent harm from occurring that arises when an officer is present and has reason to know:
This duty applies equally to supervisory and nonsupervisory officers. If aid is required, the officer shall not, when reasonable to administer aid, knowingly and willingly refuse to render aid as defined by State or federal law. An officer does not violate this duty if the failure to render aid is due to circumstances such as lack of appropriate specialized training, lack of resources or equipment, or both, or if it is unsafe or impracticable to render aid.
"Excessive use of force" means using force in violation of State or federal law.
"False statement" means:
"Perjury" has the meaning as defined under Sections 32-2 and 32-3 of the Criminal Code of 2012.
"Tampers with or fabricates evidence" means if a law enforcement officer:
20 ILCS 2610/12.7