Indiana Code Title 10. Public Safety § 10-16-7-12

Sec. 12. (a) If a person taking part in an unlawful assembly described in this chapter refuses to disperse after having been ordered to disperse in accordance with this chapter or if a command to disperse is not required under this chapter and a civil officer to whom military force is ordered to report, or if a civil officer is not present, then the military officer (or if the command is acting under the direct order of the governor, then the officer within the limits provided in the officer's instructions) shall:

(b) If, in arresting a person or dispersing an unlawful assembly:

by the civil officer or officer or member of the Indiana national guard, or other persons lawfully aiding them, the officer, member, or person shall be held blameless.