That would be interesting. I can't find any references to it other than this on the web
The marketing of Hal's system never really took off because it was too many hours and Hal was uncompromising.
There was a magazine put out by the American Deputy Sherrif's Association that featured his first seminar. I can upload photos of it. But I do not know how to do so on this site.
Reynard Jackson and Ashley Isaacs assisted at the seminar. Most of the R&D was done at Ashley's dojo in Corpus Christi.
One thing that makes Hal's system unique is that he decided to just use it in his competitions in Judo. (nothing else...no traditional Judo). he tested his kata with discipline and took it all the way to a national Championship. Now that is integrity testing. I know of no other person who has developed a DT system who can make such a claim.