27-year old Alexander Jentzsch's death remains a mystery - the scientologist died recently and the first autopsy was unable to determine the cause of death.

His mother is pursuing the reason behind his sudden passing, but claims she is running into a wall of secrecy from scientology, the controversial 'religion' started by a science-fiction writer in the 1950s that has several Hollywood types signed on including John Travolta and newly single Tom Cruise.

Jentzsch's mom says the church won't tell her anything about her son's passing.

Jentzsch is the son of Scientology president Heber Jentzsch and his mother, Karen de la Carriere, left the organization several years ago, but Alexander and his wife were still practicing Scientologists.

Now her son's dead and her daughter in-law has sided with the church.

The mother says she is not allowed to communicate with members of the church and was even shut down when she tried to get a letter to her son's widow.

She has not even been able to see her son's body at the Los Angeles County Morgue.

"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'," de la Carriere tod RadarOnline.Com.

The report notes that Alexander's wife is the next of kin, and under California law, she has control over what will happen to Alexander's body.

Leaving the church...

Radar has more quotes here, including one from Mom that said when she left the church, the management would no longer allow her son to communicate with her.

She told Radar, "After I formally left, he called me, and told me to never call, text, email, or attempt to communicate with him in any way until I got approval from the Office of Special Affairs. He told me he had to disconnect from me. Alexander sounded very odd when he said this to me, and I know that other people were listening to our phone call because I could hear noise in the background."

"Sadly, that was the last time I ever talked to him. I was hopeful that over time, I would be able to win my son back, and that he would allow me into his life," de la Carriere said.