You should send a certified letter to an authorized representative of the church outlining the relevant history of this matter and allowing the church 30 days in which to respond by letting your son view and retrieve the property. In the letter you should also note that you are in the process of securing the services of an attorney to file a claim against the church for unlawful possession of your son's property. If the church does not respond by allowing your son to view and retrieve the property, then you should secure the services of an attorney.
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