Indiana is a mandatory-reporting state: anyone who suspects neglect, battery, or exploitation of an endangered adult (18 or older, incapacitated, and harmed or threatened) is required to report it, not just healthcare or facility staff.
What to do next
Because the reporting duty is broad and applies to any person, not a defined list of professionals, family members, neighbors, and even other residents of a community are covered by the same obligation as nurses and administrators. There is no requirement to have proof before reporting -- a genuine, good-faith suspicion is the standard. Reports can be made anonymously, and Indiana law provides some protection against liability for good-faith reports that turn out to be unfounded, which is meant to lower the barrier to reporting when in doubt.