Like I said, it is NOT hearsay. The therapist who made the statement worked with the psychiatrist she cited and both treated Bruce Ivins. So, she had direct experience, and that means her statement was NOT hearsay.
Hearsay is a statement, other than one made by the declarant, while testifying at trial or a hearing offered in evidence to prove the truth of the matter asserted. See Federal Rule of Evidence 801(c). Put more simply, it is a statement being repeated by someone other than the person who actually made the statement which is used at trial or in a hearing to prove the truthfulness of the statement.
Courts will generally not allow hearsay statements or evidence to come into court.