I could not find any information on the actual crime for which he was convicted. So I can't speak to that. I could not find any "legal help for the wrongly convicted" sites that might be working on his case. In fact, the only information I could find on him was provided by himself. Not a good sign. Also not a good sign that his sites are all about his innocence and how he's been "born again".
Many people are unaware or just never thought about the fact that sociopaths are not necessarily criminals or commit criminal acts. They are people living among us that have learned to fit in to society even if they don't have a conscience or feel empathy for others. They are motivated to fit in because they want a "normal" life like everyone else.
Then there are the sociopaths that have not been able to do that. One of the common tactics for these is to immerse themselves in Christianity in order to mimic the attitudes and appearance of a Christian. These people eventually "slip up" and people around them can't believe that this person could do such a thing. It isn't necessarily murder, more often things like blatant adultery or embezzlement or even something they inadvertently say. If you are aware that these people are around us, it's easier to spot the signs.
I don't know enough about Mr. Chen to evaluate. But hopefully the generalities will give you some insight. And who knows, Stranger Things have happened, he could be innocent.
Georgia Ellis died in 1988-03.
Xavier Ellis was born on 1988-02-28.
Hugo Ellis was born on 1988-02-04.
Dan Ellis - cyclist - was born on 1988-10-07.
Ben James-Ellis was born on 1988-12-22.
She Was Marked for Murder - 1988 TV was released on: USA: 18 December 1988
Steve S. Billig was killed by George Trepal in November 1988 using cyanide-laced Excedrin capsules. Trepal was later convicted of the murder and sentenced to death.
Ellis Bertschi was born on June 20, 1988, in Thousand Oaks, California, USA.
Daniel Patrick Ellis was born on May 3, 1988, in Stuart, Florida, USA.
48 Hours - 1988 Murder in Spokane was released on: USA: 2002
Murder of Julie Ward died in 1988.
Blue Murder - album - was created in 1988.