take a look at the following websites.

The King Center transcripts of the 1999 MLK trial in Memphis - I've posted this link around a few other websites already and received the response that this trial was simply for show.  I tend to disagree, mainly because of the evidence presented. News after the trial was supressed because it exonerated James Earl Ray and showed the federal government's involvement.

TUC Radio Archive - Dr. William Pepper, the plaintiff's attorney, speaking at the 1999 MLK Trial, Memphis TN - I heard this on the radio (h/t WHUS @ UConn in Storrs CT - what a GREAT university and GREAT radio station) over Easter weekend and it really blew me away.

Google Books: An Act of State by Dr. William Pepper - Book written about the circumstances surrouding and leading to the assasination of MLK, and how numerous attempts at a trial were denied.