Ummm...ok. So you (or someone) bought a CD. Was it you or someone else and, if the latter, who was it? What did you mean when you wrote that the CD was "in trust to the Funeral Home"?
If there was no contract with the funeral home that provided for payment of the interest, then it is beyond unlikely that the funeral home has any obligation to pay the interest to anyone.
My guess is that your now-deceased relative bought the CD and named the funeral home as pay-on-death beneficiary. If that's the case, then the interest almost unquestionably belongs to the funeral home, unless some contract said otherwise (which you said isn't the case).