By Jen Heger - Breaking Celebrity News Assistant Managing Editor

Scientologist Alexander Jentzsch -- the 27-year-old son of the president of the organization Heber Jentzsch, who hasn't been seen in public since 2004 -- died on July 2 in the San Fernando Valley, allegedly of a high fever, and his mother, Karen de la Carriere, a former church member, tells Breaking Celebrity News exclusively that she isn't going to be allowed to see her son's body, which is at the Los Angeles County Morgue.

Karen de la Carriere -- who was formerly married to Alexander's father Heber -- told Breaking Celebrity News in an extremely emotional telephone interview, "My daughter-in-law, Alexander's wife, isn't allowing me to view my own son's body. My son's wife, and her parents are Scientologists, and I sent a friend of mine over to their house today with a letter for his wife. Alexander's mother-in-law answered the door and told my friend, 'all communication goes through the Office of Special Affairs. There will be no viewing or any funeral services that any of you would be invited to. Get off my property now, or else I'm going to call the po