Theories

According to the autopsy Lilian was 28 at the time of her death
By this date this puts her birth in 1939
John William James was born in 1956
If Lilian gave birth to JWJ she would have been 17 at the time of his birth
During this time period young unwed mothers were put in unwed mother homes due to embarrassment to the families
It's possible Lilian was originally put away because she was pregnant with JWJ at a young age
This could explain JWJ's need for us to look into the file of Lloyd and the death of Lilian, because she is his mother
According to this theory (and the George Madson theory) this would make JWJ and George Madson brothers and would explain the reason JWJ has such strong feelings of dislike and almost hatred towards Madson. His own brother is keeping him locked up for decades.