Didn't read all the pages but there actually is a law about aiding a police officer.
IC 35-44.1-3-3
Refusal to aid an officer
Sec. 3. A person who, when ordered by a law enforcement officer to assist the officer in the execution of the officer's duties, knowingly or intentionally, and without a reasonable cause, refuses to assist commits refusal to aid an officer, a Class B misdemeanor.
It doesn't seem like the officer directly ordered him, so it wouldn't apply. I have been on a ride along where someone had a warrant for their arrest and it was failure to appear for this charge.
"reasonable cause" covers enough area to drive a whole Army squadron through it in the case of assisting an officer against a criminal attack.
Never pass muster at the Supreme Court, either Indiana or SCOTUS.