What do parents with daughters think about this?

My daughter was playing in the water when something happened,
and she ended up needing CPR.
A man in his 40s who was nearby unfastened her bra
and performed it with her chest fully exposed.
All the men and women watching nearby saw it.
My daughter told me about this when she got home.
1. File a lawsuit immediately.
He could have done it without unfastening it.
2. Try to track him down,
express continuous gratitude,
and offer the maximum possible reward/compensation.