They didn’t necessarily confess, but police question can leave a person so confused that it can seem like they did.
It’s why you don’t ever go to the police station to answer a couple of questions without your lawyer.
I would never go to the police station to answer a few questions; especially if I was innocent. They don't care if you are innocent; they just want a conviction. Your innocence is not that important to too many cops and prosecutors.
Even with a lawyer, I would insist that any questions be pt in writing with at least a few days to answer. If they want to ask a few questions in the presence of my attorney, that meeting would happen at my lawyers office or with my lawyer at a very nice restaurant with the cops paying.