find out (something)
past tense and past participle found— phrasal verb with find us/fɑɪnd/verb past tense and past participle found /fɑʊnd/
to obtain knowledge of something, or to obtain knowledge of someone's activities, esp. dishonest ones:
How did you find out about the party?
I just found out that he was cheating on the test.
He wondered whether his boss was involved, but he saw no way of finding that out.