Whatever the defendant says can be used against him. Even if it is hearsay. Examples of hearsay that is not allowed is a witness on the stand saying another person or witness said something.
This is spelled out in the miranda warning a person is read before any questioning while in custody.
I’m saying what it was what the prosecutor said Baldwin said. Was it on tape?
“Examples of hearsay that is not allowed is a witness on the stand saying another person or witness said something.”
Heresy is allowed if the point of the heresay is not to prove the subject of the heresay is true.