How Did He Come Up With the Theory for the Ripper Murders?

He worked with little john, the tuxicologist again on this one. Studied the case and did handwriting analysis of the ripper letters. The two men prepared reports on it and sent them to scotland yard. But apparently the reports don't exist any more yet. It would be nice to know what his guess was,. i think so. I mean, he seems like a pretty reliable source. He'd be as good as anything we have for the ripper murders, definitely.