There is no specific age where children are permitted to testify, it depends on the specific child. The age of the child affects the weight that the judge will give to their testimony.
Because your spouse was not a party to these conversations between you and your daughter, then these tapes are not admissible.
I do not know if the tapes between the two of you are admissible. In North Carolina they would be because only one party needs to consent to the recording, if the law is the same in Alabama then the tapes are legal. I do not know what the law in Alabama is.
Helena M. Nevicosi
Attorney with Rosen Law Firm
4101 Lake Boone Trail, Suite 500
Raleigh, North Carolina 27607
919.787.6668 main phone
919.787.6361 main fax
Charlotte Office
301 McCullough Drive
Suite 510
Charlotte, NC 28262
Main Phone: (704)307.4600
Main Fax: (704) 9343.0044
Durham & Chapel Hill Office
1829 East Franklin Street
Building 600
Chapel Hill, NC 27514
(919) 321.0780
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