[make] a confession
1
to admit or acknowledge one's wrongdoing, guilt, or a personal secret, typically to another person or authority
- I need to make a confession.I stole a candy bar from the grocery store when I was a kid.
- The suspect made a confession to the police, admitting that he had committed the crime.
- He made a confession to his best friend about the mistake he had made.
- After years of keeping it a secret, she finally made a confession to her family about her past.